updated 05:45 pm EDT, Fri April 6, 2012
ATT Galaxy Nexus may be close based on SIM info
A rumor from an uncommon source has an AT&T version of the Galaxy Nexus close. A tipster leaked stock units to Andro Rev that pointed to full-size, likely LTE-capable SIM cards intended for the phone, implying that the phone itself might support the faster data. Most if not all of AT&T's LTE-capable devices to date, including the just-shipping Lumia 900 and the new iPad, are using micro-SIMs.
The change would be a break from the Verizon and eventual Sprint editions, both of which use micro-SIMs solely to handle their LTE access. If it uses LTE, AT&T might not need micro-SIMs because of the use of a GSM/HSPA radio instead of CDMA. Alternately, it may just be the regular HSPA+ version available in Canada, Europe, and most other areas outside of the US.
Most of the hardware should be the same, although a rumor of a 1.5GHz boosted version could apply to an AT&T model. That same model would have much faster PowerVR SGX544 graphics and could be a generational leap over the 1.2GHz, SGX540-equipped current variant.
A launch would fit the pattern exhibited with the Nexus S a year ago, where AT&T eventually got its own model several months after T-Mobile and shortly after Sprint's Nexus S 4G. The rumor isn't confirmed and comes without picture evidence, which could leave any SIMs destined for some other hardware.