Newbie question. I apologize for not doing a diligent search first but I am getting quite frustrated with this situation! About 6 months ago I purchased an unlocked 3Gs from eBay to use with my tmobile account. The phone worked beautifully from the start and I have been enjoying it thoroughly. Well not being very computer/ technology savvy, I attempted to update the phone to the latest software IOS 5.0 via iTunes. Everything appeared to be working normally during the process. However, when it seemed to be complete and in the restart or reactivating phase of the update, that's when the problem started. The PC showed a " no sim card message detected, please unplug and insert sim card..." my tmobile sim card never left the phone at this point! The iPhone displayed an " unable to activate the phone at this time because the servers are unavailable, please try again later..." My son has tried numerous downloads etc to try and get my phone back up and running but nothing seems to be helping. I really don't want to have to buy another iPhone but do I have any viable choices or alternatives? Is the phone toast at this point? ANY help would be much appreciated!