hello, i ve had the same problem. when i tried to put my sim card(greek mobile company Q-wind) it did not recognized it and it went to a loop of wanting the pin code for the card on and on. It also said that my sim is locked, in a few words it was a bizzare situation.The firware is the same as yours. The only solution was to change the rom , which i did and everything work fine. After a few days i found out that only this mobile company did not work on the sim card of the A760. Ive tryed to change the APN too but it wouldnt do. So the only solution is to change the mobile network card or to change the rom. This is a problem that few of us have in Greece with this model.