I have a hard time believing this. Apple has not stopped making money from iPhone sales. I think that someone is pulling your leg. If Apple were to bring the iphone to Tmobile, and that is a big IF, then it would be a stab at Android, and I don't think either company (Google and Apple) would want to start that.
If you have a link from a reputable source, then I would consider it, but still, highly doubtful.