Xteink X4 vs X4 Pro vs S4: Which to Buy in 2026?

Earlier in 2026 the Xteink X4 became the first non-Kindle e-reader to crack Amazon’s e-reader top-10, outselling the Kindle Colorsoft. A $69 button-only pocket reader did that. Then the S4 entered the rumor mill, and on July 21, 2026, the X4 Pro shipped at $99. The Reddit question is no longer “buy now or wait.” It’s which of three real Xteink devices to buy.

This guide covers the X4 (shipping now, $69), the X4 Pro ($99, launched July 21), and the S4 (China-only, no international release planned as of August 2026). It also answers the comparison more people actually search: X3 vs X4.

Quick AnswerWhy so many models?Spec comparisonWhat each model isFirmwareWait for a New Kobo?Which to buyFAQ

Quick Answer

The two most common buying freezes in the community right now both come down to “buy now, or wait?”:

Want the smallest, simplest reader and don’t care about apps? There’s a fourth option: the older Xteink X3. It drives the most-searched comparison in the lineup (“xteink x3 vs x4”), and for a specific buyer it’s still the right call.

Why Are There So Many Xteink Models to Choose From?

Xteink now ships three pocket e-readers at once: the X4, the smaller X3, and the July-launched X4 Pro. A fourth, the S4, dominates the threads but has only shipped in China. A year ago “which Xteink should I buy” had one answer; now the lineup sets three traps for buyers.

The way out: anchor the decision on what you actually read and where, not on the most exciting unreleased spec sheet.

Xteink X4 vs S4 vs X4 Pro: Full Spec Comparison

The X4, X3, and X4 Pro ship internationally; the S4 does not. Read the columns by confidence. The S4 column is reported/leaked, pieced together from official teasers, Joshua Lowcock’s tracker, Notebookcheck, Good e-Reader, and eReadersForum, so treat it as “what’s claimed,” not confirmed. The X4 Pro column comes straight from Xteink’s product page, confirmed at launch. Where research has no figure, the cell says so.

Two things that trip people up:

• The X4 has no “storage” in the phone sense. Its ESP32-C3 carries 16MB of flash for the firmware; every book lives on the microSD card. Reviews quoting a “16GB” or “32GB” X4 are conflating the bundled card with onboard memory. (The X4 Pro’s 16 GB is different and real: an actual microSD card in the box, expandable to 256 GB.)
• The X3 charges over a magnetic pogo-pin cable, not USB-C. The cable won’t fit your phone charger, and a 2-pin pogo cable charges but carries no data, which blocks anyone trying to flash the X3 from a laptop.

What Is Each Xteink Model (and Where Does the X3 Fit)?

Xteink’s lineup splits by philosophy. The X4 and X3 are open, button-only ESP32 readers; the X4 Pro adds a front light and touch on Xteink’s own OS; the S4 (China-only) is the Android one.

The Xteink X4 is a button-only pocket e-reader on an ESP32-C3 chip: no touchscreen, no front light, no app store, DRM-free EPUB and TXT only. Its appeal is three things: tiny (77g) and pocketable, $69, and open enough that the community built CrossPoint and a constellation of firmware on top of it. If you want a focused reader and don’t mind a little setup, it’s complete. If you need Kindle, Libby, or a front light, it’s the wrong product, full stop.

The Xteink X3 is the smaller, older sibling, and “xteink x3 vs x4” is the most-searched comparison in the lineup. Its smaller screen packs a denser, higher-PPI image for crisp text in a tinier body; it adds NFC for tap-to-open shortcuts; and it runs the same XTEINK OS, so CrossPoint and X3 forks like INX work on it. The catch: the X3 charges over a magnetic pogo-pin cable, not USB-C, one more proprietary cable to track. The X3 is right for one specific buyer, the X4 for almost everyone else.

The Xteink S4, if the leaks hold, is what happens when Xteink swaps the ESP32 stack for Android 11. The philosophy flips: sideload APKs instead of flashing firmware, a touchscreen instead of buttons, adjustable warm-to-cool lighting instead of none. That would make the S4 the first Xteink to compete with a Kindle or Kobo at the software layer. The rumored tradeoff: Android 11 without Google Play Services (apps sideloaded, not from the Play Store) and no CrossPoint. None of this is verified. The S4 is reported on sale in China only, with no international units and no hands-on reviews.

The Xteink X4 Pro launched July 21, 2026 at $99 ($109 list), and it’s what X4 owners have wanted since day one: a 4.3-inch, 219 PPI panel with an adjustable warm/cool front light, a touchscreen plus physical buttons, and Xteink’s own OS (XTOS), not Android. Naming note: “X4 V2 Pro,” “X4 Pro,” and “X4P” all name the same device, tied together by the FCC filing 2BTR9-X4PRO. It is not the S4, and not a new base X4. A fourth name is still just a leak: July 16 AliExpress slides showed an X4 Gen 2, a lighter, light-free, touch-free refresh of the base X4, unconfirmed and distinct from both the Pro and the S4. Our X4 Pro launch hub tracks full specs, stock, and reaction.

Firmware: The Real Reason the X4 Matters

The single best argument for the X4 over the S4 or the X4 Pro isn’t a spec. It’s that the X4 (and X3) sit on an open ESP32 platform that a real community has built on. None of that exists for the S4 today, and it doesn’t exist for the X4 Pro yet either.

CrossPoint is the flagship: the main firmware for both X3 and X4, written in C, MIT-licensed, with an active issue tracker. The current stable release is 1.5.0 (August 2026), and since v1.3.0 it can take SD-card OTA updates without USB. It’s what most owners end up running, and it’s the firmware our setup guide walks through flashing.

Around it sits a genuine ecosystem of forks, each scratching a different itch:

• CrossInk (uxjulia/CrossInk) adds reading stats, Bionic Reading, and improved fonts. The latest release is v1.4.0.1 (July 2026). It installs over the USB web flasher (no SD route), so it needs an unlocked unit, not a locked-device pick.
• Microreader is written from scratch and X4-only (no X3 support, though users keep asking). If you’re on an X3, this one isn’t for you.
• Papyrix (bigbag/papyrix-reader) is lightweight, adding FB2 / Markdown / TXT plus theming and support for additional (right-to-left) scripts. Note it does not support OTA updates.
• AvesO3 is an AO3 fanfiction reader firmware built on CrossPoint 1.2.0, for unlocked devices only. Niche, but beloved by the fanfic crowd.

For position sync and library transfer there’s also KOReader Sync and the open-source CrossPoint Sync app (iOS + Android), which adds Wi-Fi book transfer and web-article clipping as a fourth transfer method beyond Calibre, web upload, and WebDAV.

There’s an official lane too: XT-Cloud, Xteink’s own book-sync service (an XT-Cloud account plus the Companion App handles wireless transfer for the X3 and X4). It has no public API, so it’s a convenience layer, not something the community can build on, but it’s the most hands-off way to load books. We haven’t verified whether it works with the X4 Pro yet.

None of this runs on the S4. If the S4 ships on Android, its analog of “community enhancement” would be KOReader’s Android build, excellent and well-maintained, but a different tool and a different community. The X4 Pro’s firmware story is no longer unknown, just unfinished: CrossPoint doesn’t run on it in the stable build yet (the touchscreen, front light, and a new real-time clock are new hardware to support), but porting has moved past groundwork. An open pull request (#2675) the maintainer calls “the base for the x4Pro work” laid the base, and a tester beta for the X4 Pro is now up on the CrossPoint site as of v1.5.0, though nothing is stable yet. For a head-to-head of every option, see the firmware comparison.

One buying note: the firmware lockdown that blocked custom firmware on some units (reported around early May 2026) only affects devices bought from AliExpress, Taobao, and other Chinese domestic retailers. Units from xteink.com and Amazon are not affected, per Xteink’s own statement. If custom firmware matters, buy from xteink.com or Amazon and verify the USB flasher the moment the device arrives.

The X4 Pro’s product page adds one more data point, an Unrestricted Firmware Guarantee: “All units purchased directly through the XTEINK official website are exempt from third-party firmware restrictions. This commitment applies to all past and present models, with no planned changes for future updates.” That’s Xteink formally promising the firmware lockdown won’t spread to official-store units, the Pro included. Keep it separate from the port question: the guarantee is a legal “won’t be locked” commitment, not a sign CrossPoint runs on the Pro today (it doesn’t yet). The community’s purchase gate for firmware-first buyers, from a launch-week thread, is blunt: “wait until cross point is ready and proved working on the pro.” If CrossPoint is why you own an X4, that’s the honest bar to clear before buying the Pro.

Which Hardware Differences Actually Decide the Choice?

Four hardware differences decide most Xteink purchases: front light, touchscreen vs. buttons, charging port, and DRM/app support. Here’s each with the X4, X3, S4, and X4 Pro side by side.

Front light

The X4 and X3 have no front light. The rumored S4 is said to add one, and the X4 Pro actually does: an adjustable warm/cool light confirmed on the product page. It’s the single most-requested feature in the X4 community, and the limitation that most pushes long-term owners toward clip-ons or other devices. The workaround is real (Xteink’s own magnetic reading light is about $10, plus third-party clips and DIY rigs), but a workaround is a workaround. If you read in bed or on planes, the X4 needs an accessory; the X4 Pro solves it in hardware for $99.

One more X4-specific tip if you read outdoors: white X4 units can wash out in direct sun, and CrossPoint ships a setting called Sunlight Fading Fix (under Display settings) made for exactly that.

We don’t have a Pro unit yet, and still don’t have an S4 unit. Front-light quality (whether warm/cool adjustment is smooth or notchy, and whether uniformity holds on a 4.3” panel) is the thing we most want to verify hands-on the day we get one.

Touchscreen vs. physical buttons

The X4 uses three rockers plus a power button, no touch. The rumored S4 and the shipping X4 Pro both add touchscreens, and the community is split. Critics are right that the X4’s buttons behave differently in menus versus books with no on-screen cue, accidental presses happen, and navigation has a learning curve (stock firmware makes it worse, CrossPoint much better). Defenders are right that physical buttons mean no accidental touches while reading: your thumb rests on a rocker and pages turn only when you press. Coming from a touchscreen, the buttons feel slower at first; a week on CrossPoint and the friction mostly disappears. If you want it to just work on day one, a touchscreen feels more intuitive.

Launch week gave the skepticism a concrete face. In a thread with 369 upvotes reacting to the July 16 Pro/Gen 2 leak, the top comment argued the touchscreen undoes what made the X4 good: “I think the company does not realize that the simplicity of the device is its biggest selling point… touch screens on ereaders… easy to flip a page by accident… another layer on the screen, so the contrast decreases.” That’s a real physical tradeoff, not just nostalgia (an added touch layer does measurably cut E-Ink contrast), and it’s likely why the X4 Pro kept physical buttons alongside the touchscreen.

There’s now a concrete data point on the Pro’s touch quality. Joshua Lowcock’s hands-on review of a pre-release unit found the touchscreen “laggy,” with a visibly cheap touch layer (“you can see the touch screen layer from certain angles… like small microdots on the screen”), and his verdict is blunt: “I would not buy the XTEINK X4 Pro yet until they fix the touch lag.” That’s one reviewer’s early pre-launch unit, but it’s the first real answer to the “is the touchscreen actually good” question.

Can the Pro’s touchscreen be switched off? Owners say yes: an owner in a launch thread reports “there is already an option to turn off the touchscreen while reading,” and it appears in the launch trailer. Treat it as owner-reported, not vendor-confirmed: Xteink’s product page markets touch and buttons as a choice (“Tap and swipe the touchscreen, or use dedicated physical buttons”) but doesn’t document the exact toggle, and no press reviewer has walked through it.

The X4 Pro’s front-light battery drain, and the USB-C-to-pogo-pin swap

Two concrete answers worth knowing before you consider the Pro over a shipping X4, one confirmed at launch and one still an early reviewer’s finding:

• USB-C-to-pogo-pin tradeoff: now the #1 objection. Confirmed at launch: the X4 Pro has no USB-C port. It charges over a pogo-pin connector (the same style the X3 uses) and ships with a magnetic adapter (which also fits the X3) but no charging cable, so you supply your own USB-C cable for the adapter. This is the most-repeated launch-day complaint: the top comment on the July 20 spec thread (81 upvotes) reads “the removal of usbC to pogopin alone is enough for me to stay with X4. I dont want to be having a dedicated charger. I hate that,” and it repeats in the “torn about the X4 Pro” thread. If a dedicated adapter is a dealbreaker, that alone is reason to stick with the X4’s plain USB-C.
• Backlight battery drain. The Pro’s battery is confirmed at 1,100 mAh, a real jump over the X4’s cell, but the number alone doesn’t settle read-time, since the front light draws power the X4 never had to. Lowcock’s pre-release unit hit “some wildly fast battery draining issues” with the light on, life that “drained in minutes,” which he suspects is “(another) software bug” and worked around by leaving the light off. Treat that as provisional pre-launch software: a retail-unit video review reports the opposite, the bigger cell “helps offset how much more of it the front light uses up,” and the Pro charges infrequently in normal use. It’s still the open question a heavy-reader thread asked: does the bigger battery outlast the X4 for someone reading 5+ hours a day? No definitive shipping-unit answer yet.

We don’t have a Pro unit yet. Touch latency against the X4’s buttons, and whether the front-light battery drain Lowcock hit on his early unit survives shipping firmware, are the two things we’ll verify the day we get one.

DRM, apps, and the Kindle migration question

This is the clearest dealbreaker. The X4 runs DRM-free EPUB and TXT only. It cannot run the Kindle app, connect to Libby/Overdrive, or touch Kindle Unlimited. The rumored S4, on Android 11, would change that via sideloaded APKs: Amazon distributes the Kindle APK from its own site (no Play Store needed), Kobo and Libby’s Android apps can be sideloaded, and KOReader’s Android build covers EPUB/PDF/MOBI/CBZ/FB2 and more, at the cost of manual, per-app installation.

If your library is locked in Kindle’s ecosystem, there’s a grey area worth naming carefully: CrossPoint (like KOReader) cannot open DRM-protected EPUB. The legal, non-piracy approach is to read DRM-free books you already own or buy DRM-free from the start (Project Gutenberg, Standard Ebooks, many indie stores), and, for books you’ve purchased, to de-DRM your own library before converting. We don’t publish a step-by-step for that, and we don’t endorse stripping DRM from books you don’t own; the safe default if Kindle is non-negotiable is to wait for the S4. A practical gut check: do you mostly read books you bought from Amazon or borrowed from a library? If yes, the X4 only makes sense if you’re willing to move to DRM-free sources.

Battery and power

The X4’s battery is fine for most people; owners charge it roughly once a week. The rumored S4 is said to carry a larger battery, but Android draws more continuously than the X4’s bare-metal ESP32 firmware (background sync, OS processes), so don’t assume the read-time ratio matches the capacity ratio. The S4’s real battery number needs hands-on data that doesn’t exist yet.

Or Wait for a New Kobo Instead?

As of July 2026, there’s little reason to wait for a new Kobo instead of an Xteink: no next-gen panel is announced, prices just rose, and the one wildcard looks like software. Kobo is the other established non-Kindle option, so it’s fair to check, but the evidence points the wrong way.

No new e-ink panel is confirmed. As of April 2026, Kobo hasn’t announced Kaleido 4, Gallery 4, or Carta 1400, the next-generation color and contrast panels the industry has been watching for. eReadersForum’s tracking of the display-tech calendar puts the earliest realistic reveal window at CES or SID Display Week in mid-2026, with actual consumer devices built on that tech realistically landing in 2027, not weeks or months from now. If your reason to wait is “a real hardware leap,” you’re waiting for something that hasn’t been announced, on a timeline nobody at Kobo has committed to.

Meanwhile, prices went up, not down. Kobo raised the Clara BW, Clara Colour, and Libra Colour in mid-May 2026: the third price increase across the lineup in roughly three years, after two earlier $10 bumps, this one $20-$40 depending on model, on hardware that’s now two years old with no announced successor. Community reaction on eReadersForum’s discussion thread was mixed but skeptical of the timing: one owner wrote “This price jump makes it less likely I will buy a Kobo without an upgrade or price drop.” Another, an existing Libra Colour owner, was more forgiving of the increase itself but drew the same conclusion about waiting: “unless a new Kobo with major enhancements is released, I will stay with it.”

There is one wildcard, and it’s thin. In early July 2026, Kobo’s CEO sent a customer email teasing unspecified “projects” for the second half of 2026 that would “fundamentally change how we read and write.” No product name, feature list, or date was attached, and the community’s own read leans toward software (AI or notetaking features) rather than new hardware. That reading gets support from a separate angle: a July 2026 eReadersForum thread points out Kobo hasn’t shipped a genuinely new industrial design since the 2021 Elipsa, and that the Clara BW’s shell traces back to the 2018 Clara HD and the Libra Colour’s to the 2019 Libra H2O, with only internal and software updates since. Nothing here says Kobo can’t surprise everyone, but there’s no confirmed hardware to wait for today.

Put the pieces together and the “wait for Kobo” case is weaker than tracking the S4, and much weaker than “buy the X4 Pro now”: the Pro has already shipped, while the S4 at least exists as a China-market product with a reported domestic price. A wait for a new Kobo bets on an unannounced panel, an unspecified “fundamental change” that may be software, and a company that has just made its current lineup more expensive rather than less. If Kindle- or Kobo-style app support is genuinely non-negotiable for you, the S4 is still the device to track, but know that tracking is all it is: with no international release planned, owning one means importing.

Which Xteink Should You Buy for Your Use Case?

There’s no universal answer; the right Xteink depends on what and how you read. Match your use case to the grid, then read the two notes that follow.

On the X3 charge-cable trap. If you go X3 and ever plan to flash it from a laptop, get the 4-pin pogo cable. The 2-pin version charges but carries no data, and a lot of “my X3 is locked” panic is really just a charge-only cable.

On reading more and scrolling less. The quietest but most common reason people buy an Xteink. A button-only device with no browser, apps, or notifications is a behavioral tool: friction to open anything but a book, always in your pocket, far fewer dopamine traps than the phone it replaces. One owner wrote it “saved 8 hours and 40 minutes of doomscrolling by… READING! This is the first book I’ve finished in years.” Another credited “finishing 10 books in 2 weeks” after short chapters “got me out of my reading slump.” A third: “I feel extremely manipulated by my iPhone and the access to social media.” The counterintuitive part: if breaking the phone habit is the goal, the X4’s “limitation” is the feature, and the S4’s app store is the wrong direction, a device that can sideload apps can run the same traps you’re escaping. It’s a nudge, not a cure, but the simplest device is the most effective.

How Do You Pick and Set Up Your Xteink?

The pick collapses to four questions. Answer in order and stop at the first “yes.”

How to choose:

1. Do you need Kindle, Kobo, or Libby? If yes, wait for the S4 (and accept there’s no confirmed date). If no, continue.
2. Do you need a built-in front light you can’t solve with a clip-on? If yes, buy the X4 Pro ($99; stock has been intermittent since the first batch sold out day one). Otherwise continue.
3. Do you want the smallest possible body and NFC, and are you fine with a proprietary charge cable? If yes, buy the X3. If no, continue.
4. Otherwise, buy the X4. It’s the default for almost everyone: shipping today, $69, the largest firmware community.

If you land on the X4 (or X3), the first-hour setup is short:

Steps:

1. Buy from xteink.com or Amazon, not AliExpress/Taobao. That’s the only way to be sure the unit isn’t firmware-locked.
2. When it arrives, plug it into a laptop and confirm the USB flasher detects it before you do anything else. (On an X3, make sure you’re using the 4-pin data pogo cable, not a 2-pin charge-only one.)
3. Flash CrossPoint. Our CrossPoint flash guide walks through it step by step.
4. Format a microSD card as FAT32 (exFAT only if it’s a card larger than 32GB) and load a few DRM-free EPUBs to test before committing your whole library.
5. If you read outdoors on a white unit, turn on Sunlight Fading Fix under Display settings.

Before you trust it with your reading life, load 3–5 EPUBs from different sources (Project Gutenberg, Standard Ebooks, a Calibre export) and confirm each opens and remembers your place after a reboot. That one check catches most format and SD-card problems on day one.

Frequently Asked Questions

These are the real questions circulating across r/XTEINK, r/xteinkereader, and r/ereader right now, with direct answers.

The Bottom Line: X4, S4, or X4 Pro?

The X4 Pro is no longer a promise: it’s a shipping product with confirmed specs, a real price, and a firmware guarantee in writing. Only the S4 (no international ship date, no confirmed specs) and the leaked X4 Gen 2 stay unknown. So the “xteink x4 vs x4 pro” debate collapses to four lines once you stop treating unreleased devices as if they’re for sale:

• Buy the X4 ($69) if you’re a button purist, you depend on a plain USB-C cable, or you’re trying to read more and scroll less. It ships today, and it has by far the biggest firmware community.
• Buy the X4 Pro ($99) if you read in the dark and can live with pogo-pin charging (a magnetic adapter is included, no cable) and no CrossPoint yet. Stock has been intermittent since it sold out on day one.
• Hold out for the S4 only if Kindle, Kobo, or Libby is non-negotiable, and accept what that now means: no international release is planned, so you’d be importing from China with no warranty path.
• Get the X3 if you want the smallest body and NFC over a bigger screen.

If you decide on the X4 or the X4 Pro, two reads will get you the rest of the way: the firmware comparison to choose between CrossPoint and its forks (X4 only, for now), and the CrossPoint flash guide to set it up in your first hour. Grab the X4 from xteink.com (also on Amazon) or the X4 Pro from xteink.com, flash CrossPoint on the X4, and start reading; you can always reassess when the S4 actually ships.

Sources

• Xteink X4 Pro product page: xteink.com, launched July 21, 2026 (price, specs, first-batch stock, Unrestricted Firmware Guarantee)
• “XTEINK X4 Pro Full Details Are Available (X4 vs X4 Pro)”: r/XTEINK, July 20, 2026 (spec-comparison thread; pogo-pin objection; touch-disable speculation; X3 Pro speculation)
• “Torn About the X4 Pro”: r/xteinkereader, July 20, 2026 (CrossPoint purchase gate; “Kindle territory” price objection)
• “Cases and Screen Protector for X4 Pro”: r/xteinkereader, July 21, 2026 (X4 accessories don’t fit the Pro)
• “Xteink X4 Gen 2 and X4 Pro Leak from AliExpress”: r/XTEINK, July 16, 2026 (pre-launch leak thread; touchscreen-simplicity objection)
• “X4 Pro: New Official Video”: r/XTEINK, July 19, 2026 (community reaction to the official launch video)
• Xteink X4 Pro official launch video: YouTube, July 19, 2026
• Official Xteink S4 teaser
• Xteink S4 price announcement
• Official Xteink Note blog (S4 announcement)
• Joshua Lowcock S4 tracker
• Joshua Lowcock X4 V2 Pro tracker
• “First Review: XTEINK X4 Pro, the X4 V2 Hands On”: Joshua Lowcock, July 2, 2026 (touchscreen lag, front-light battery drain, USB-C-to-pogo cable, no USB-C port)
• “Xteink S4 & X4 V2 Pro Delayed Launch?”: r/xteinkereader, July 16, 2026 (pogo-connector community complaints)
• “Kobo eReaders Now $20-$30 More Expensive After Price Hike”: the-ebook-reader.com, May 19, 2026 (third Kobo price increase in three years)
• “Kobo Has Raised Prices Again — and This Time the Jump Is Harder to Ignore”: eReadersForum, May 19, 2026 (community reaction to the price hike)
• “Will Kobo Wait for Kaleido 4 Before Launching New E-Readers in 2026?”: eReadersForum, updated April 26, 2026 (no new e-ink panel confirmed; 2027 realistic timeline)
• “Kobo Teases ‘Fundamental’ Changes for Late 2026”: eReadersForum, July 3, 2026 (CEO teaser email, no specifics)
• “Has Kobo Basically Stopped Redesigning Anything?”: eReadersForum, July 2026 (industrial design has been static since 2018-2021)
• Notebookcheck S4 coverage
• Good e-Reader S4 coverage
• eReadersForum S4 Android pivot analysis
• The Well-Appointed Desk S4 vs Boox Palma analysis
• eReadersForum X4 long-term use thread
• eReadersForum X4 limitations review
• eReadersForum firmware lockdown thread
• Liliputing firmware lock coverage
• The eBook Reader blog firmware lock coverage
• CrossPoint Reader firmware

Last updated: August 7, 2026. Aug 7 rewrite: reshaped the section headings into the buyer questions people actually search ("why are there so many models," "full spec comparison," "which hardware decides it," "which should you buy," "how do you pick and set it up," "the bottom line"), led each with the answer, cut intra-page cross-references so every section reads standalone, and tightened the prose throughout. No facts, specs, or citations changed. Aug 3 sync: re-verified the live product page: the Pro currently reads out of stock and has cycled in and out since launch, so availability is phrased as intermittent rather than a fixed in-stock stamp; the $99 price is unchanged. July 22 sync: the Pro is back in stock at $99 (Space Black) after selling out day one; the CrossPoint firmware lines now say the port has started (PR #2675, "the base for the x4Pro work") rather than "hasn't been ported," kept distinct from the legal firmware guarantee; touch-disable is updated to owner-reported; and the battery framing is balanced with a retail-unit review against Lowcock's pre-launch drain. Retitled for launch day: the X4 Pro shipped July 21 at $99 ($109 list), so this is now "X4 vs X4 Pro vs S4," not "X4 vs S4." Replaced every rumored X4 V2 Pro spec with the confirmed launch specs (219 PPI, warm/cool front light, 1,100 mAh, pogo-pin charging, XTOS), added the Unrestricted Firmware Guarantee quoted from the product page, and confirmed CrossPoint does not run on the Pro yet. Added launch-week community reaction: the pogo-pin/USB-C objection (81-upvote thread), the touchscreen-simplicity pushback, the unconfirmed touch-disable question, the case-incompatibility answer, the sold-out 500-unit first batch (restock "the 23rd"), and the "$99 is Kindle territory" price objection. Four new FAQs added; the wait-trap and rumor-trap framing now applies only to the S4 and the leaked X4 Gen 2.