Hello everyone, I need your suggestions. I'm planning to switch from AT&T to T-mobile to save some money. I currently have 2 lines with AT&T. I use iphone 6+ (6 months old) & my wife is using iphone 5s (1 year old). Both of the phones is on AT&T Next plan. My questions: 1. Will the iphone 6+ & 5s work on T-mobile 4G LTE network if i unlock my phones from AT&T? I know for sure the calling + 3G will work but not sure if the 4G LTE works? 2. Can I claim the ETF of $350 each from T-mobile even for AT&T Next plan if I payoff the AT&T and switch to T-mobile ? 3. I'm thinking of adding my 2 lines to my brother's existing family Account who already has 4 lines. If i port my connection to my brother's family Account will i still be able to claim the ETF of $350 each or this ETF applies only to a new T-mobile Account ? 4. I have to pay off $636.75 for iphone 6+ and $374.99 for iphone 5s to make this switch from AT&T. I have been paying around $160 a month for 2 lines. Any other tips to save some money ? Thanks for your time and advice.