Why is the CP-623 not compatible with at&t 1520?

[claireggie]

Hi everyone i just got a 1520 and im lookin out for a case but then i saw this on the nokia website

Nokia Protective Cover for Lumia 1520
CP-623

Keep your Nokia Lumia 1520 protected with this handy cover which doubles as a stand. (NOTE: Not compatible with 1520 AT&T variant.)

All accessories - Top Mobile Phone Accessories - Microsoft - USA

Nokia Protective Cover for Lumia 1520 - Microsoft - USA

NEW Genuine Lumia 1520 Flip Cover Case CP 623 Yellow | eBay

?

 

[Harrie-S]

This case supports QI wireless charging but the AT&T 1520 supports PMA wireless charging.
Both are wireless charging standards but work different hence it is not compatible. (I think however it will physical fit)

 

[Timbre70]

AT&T 1520 does not have in built wireless charging function, while all other variants have which of course is slightly thicker than AT&T version.

 

[claireggie]

oh is that it? but it will still fit?

 

[MDK22]

oh is that it? but it will still fit?

It'll probably fit, on the AT&T version you'll cover up the PMA wireless charging pickups (the 3 dots on the back, about a quarter of the way from bottom)

There's NO difference in size (thickness) between the RM-938 (unlocked unicorn) & the RM-940 (AT&T).