Cases & Covers
X3, X4, and Pro shells do not interchange. Snap-ons keep the phone-back magnet. Slim shells may weaken it. Sleeves come off to read.
| Type | Preserves magnet? | Best for |
|---|---|---|
| Magnetic snap-on | Yes | Phone-back carry |
| Slim shell / flip | May reduce strength | Pocket or bag |
| Leather sleeve | n/a, slides off to use | Bag carry only |
Back-snap shells that leave the phone-mount magnet open.
X4 Official Top pick Official back-snap in six colours. Leaves the magnetic mount open.
Caution: Fits the X4 only, not the X4 Pro. The Pro is 3 mm shorter, drops the bottom-button cutout and relocates the back magnet, so X4 cases do not fit it.
X3 Official X3 pick 
X4 Amazon PU-leather back-snap for the X4. Magnet stays usable. Soft anti-scratch liner.
X4 AliExpress Third-party magnetic back-snap for the X4, several colours.
X3 · X4 AliExpress Full-wrap magnetic cover with reinforced corners. Fits X3 and X4.
Etsy magnetic cover plus silicone case cut for the X4 Pro.
Caution: Community find, not an official Xteink case. Confirm the listing says X4 Pro before you pay: X4 shells do not fit the Pro.
More knock protection. Some weaken the back magnet. Better in a pocket or bag.
X4 Official Cheapest 
X4 Etsy Face out to read, flip to cover the screen in a bag.
X4 Amazon Faux-leather flip wallet. Magnetic closure, card slots, kickstand.
X4 Amazon Colourful shockproof cover bundled with two tempered-glass screen protectors.
X4 Etsy PETG book-style case, 3D-printed to order. Looks like a small hardcover.
Hardcover-style X4 case with a magnetic lid and a rear magnet for a reading light.
Caution: Fits the original X4 only. Confirm the live listing for the model you own; X3 and X4 Pro shells are not shipping yet.
Slip-in pouches for bag carry. Pull the reader out to use it. No phone-back mount.
X4 Etsy Most reviewed Genuine-leather X4 pouch with a card slot and pen holder. Personalisable with name engraving.
X3 · X4 Etsy Full-grain veg-tan sleeve. Patina with use. Fits X3 and X4.
X3 · X4 Mo Corner Wet-moulded to X3 or X4 dimensions. Made to order.
Vertical-flip leather case with an elastic strap and a sewn-in magnet ring.
Magnetic snap-ons leave the back magnet exposed. Slim polycarbonate shells that cover the back can weaken the pull. Leather sleeves come off before you mount, so they never sit on the magnet.
No. X3, X4, and X4 Pro are different sizes. Buy the listing that names your model.
No. The X4 Pro is 3 mm shorter than the X4, drops the bottom-button cutout, moves the back magnet, and uses a pogo-pin port instead of USB-C. X4 cases do not fit. An owner who tried it said the Pro does not fit the X4 magnetic case at all. Buy the X4 Pro Magnetic Case or the X4 Pro Protective Case.