I have a bit of an issue. I'm stuck with Rogers and I want to go with Telus, However.. My phone when I bought it was running IOS 4.0. Being a 3G I obviously downgraded back to 3.1.3 no problem.. However, My baseband was upgraded to 05.15.04 and I don't want to use IOS 4.0 to unlock my carrier. Is there a work around for this?