According to several reports, AT&T and Nokia will not be joining forces to release the X7 handset in the United States. As you may recall, the X7 — which has been seen sporting an AT&T logo on several occasions — is being billed as a high-end, Qt-enabled, Symbian smartphone, complete with four external speakers, that focuses on mobile gaming. Blogs PocketNow and The Nokia Blog have both weighed in on the matter, with the former stating that AT&T scuttled the handset release while the latter suggesting that Nokia was the one that pulled the plug. At CES, AT&T announced that a Qt-enabled Symbian set was due on its network sometime in Q1 of 2011; for this reason, many industry insiders speculated that handset was the X7. Both report cite persons familiar with the matter, but are, up to this point, speculative. We’ll keep our eye on this one and let you know if anything changes.