When we reviewed the Sony Xperia Z Ultra, it was with the C6802, a HSPA+ model devoid of LTE bands. However, it seems that a speedy 4G version of the handset will arrive stateside soon, if this recent FCC listing is any indication. The document shows what is clearly the Sony Xperia Z Ultra, but with AT&T-compatible HSPA+ and LTE on board. This means it's likely the C6806, the handset's North American cousin, all set up to take advantage of Ma
