Nokia claimed the Lumia 1520 would launch with built-in wireless charging, but it looks like U.S. consumers may be forced to buy a separate charging shell to take advantage of this feature. Yesterday we learned that the Windows Phone 8 phablet would be an AT&T exclusive at launch, and today the carrier revealed its customers will have to pay extra for wireless charging.

AT&T’s Lumia 1520 product page—which looks pretty great for the most part—clearly states, “Wireless charging shell sold separately,” in a section focused on the phablet’s battery. WPCentral also points to one image of the phone on AT&T’s website that shows three contacts on the back of the device near the bottom which would connect to a charging shell the company will apparently be sold separately.

It’s unclear why AT&T decided to cut out wireless charging from the Lumia 1520, while international versions of the phone will presumably come with the technology. It’s possible that AT&T hopes to reduce the phablet’s price for consumers, though it’s also worth noting the company is involved in the Power Matters Alliance, an organization which offers a rival wireless charging standard to the Qi standard used in the Lumia 1520.

TechnoBuffalo reached out to AT&T for comment but a spokesperson was not immediately available.

UPDATE: An AT&T spokesperson contacted us with the following statement confirming the carrier’s Lumia 1520 variant won’t feature built-in wireless charging and will instead support a separate accessory based on the Power Matters Alliance standard rather than Qi.

“The Nokia Lumia 1520 will support the PMA standard via a wireless charging accessory available around launch time.”