Hello, Thanks for any help in advance.. I have an IPhone 3GS 3.1.2, 05.11.07 Serial Number 86929.. I am running it on Tmobile with Blackrain and Cydia. Cydia says I have 3.1.3 SHSH . My phone needs to go in to apple for repair. It keeps thinking its connected to an accessory and most of the time doesn't have sound. Ive tried cleaning the dock connector with no results. I'm guessing they are probably going to give me a refurb phone or if they try and repair mine they are going to update it. Is there anything I can do now to put my phone (once repaired) or a refurb phone, back to where it was(unlockable)?