Hey guys. I recently imported an AT&T branded HTC ONE X+ into Australia where I live. The IMEI states the phone is unlocked. When I use my Australian SIM card in it I can send texts and call people but it will not update. In the settings menu it has "AT&T Software Update" and when I click on it it searches and then says no update was available. Is there a way around this? Can I completely rid the phone of all AT&T affiliation? Thanks in advance!