hi guys ive just purchased an ascend y201 pro which was a telstra locked prepaid with 850 3g on the box. it has been unlocked but when i insert my optus sim 900 3g i cant connect to 3g. is there anyway to get around this problem? please help as im due to send my samsung off for repair soon and if i cant get this huawei going ill be with out net altogether until samsung comes good. as you would gather i am a noob with this stuff and would greatly appreciate any help.