I have a question. What actually happens if you do a warranty exchange and don't downgrade software. Right now I have an 8900 with .168 that I'm exchanging due to radio issuses. (Continually drops to edge when my other 8900 is fine). If I don't downgrade what will T-Mobile do if anything? I think I exchanged an 8320 before and didn't hear anything or get any charges on my bill. Please only reply if you know. Don't tell me to do it to be safe or your friend got charged cause he didn't. First hand info please
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