Motorola hasn't introduced a single new smartphone in the US since 2012. But it will do it starting "late summer", when the long-rumored Moto X is going to be released. Motorola and Google are planning to launch several versions of the handset (also called X FON in some reports) via all major US carriers.
From previously leaked details, Verizon's Motorola X is the XT1060, the AT&T version is the XT1058, while Sprint is going to have the XT1056. Now it looks like US Cellular's Moto X has been discovered, too, as the XT1055 which received FCC's stamp of approval earlier today.
Unwired View , XT1055 might be a Motorola X Phone for US Cellular, XT1055 might be a Motorola X Phone for US Cellular