AT&T has began to supply its retailers with micro-SIM cards for LTE-compatible devices, according to phoneArena.com. The carrier has also requested that existing micro-SIM stock be scrapped in favor of the new modules. The site suggests that the micro-SIMs will be used for the upcoming Nokia Lumia 900 — which BGR exclusively reported will launch on March 18th for $99 — and The Verge’s Chris Ziegler also notes that the Pantech Burst utilizes micro-SIM cards. With the launch of Apple’s Pad 3 just around the corner, however, these new micro-SIM cards may find their way into LTE-enabled iPads before they make it to Nokia’s upcoming flagship smartphone. Read on for a purported screenshot from AT&T’s system.