I'm thinking of switching to Tmobile (as long as they will give me a Cel Fi for my house). We have 2 iPhone 5's and each had a $200 ETF. AT&T has said that they'd let me upgrade each line (at $25 more per line). Any reason why I shouldn't upgrade both lines before switching? This will put the ETF's at $350 but we could still trade in the iPhone 5's and keep whatever we got on upgrade and Tmobile would still pay the ETF... Or am I missing something?