I need a new phone and a different carrier than AT&T…my iPhone 6 is cracked and the battery is good for a few hours only and I want to try different carriers without a contract because I just moved. I’d like to buy my next phone outright but I read here that sim free (GSM and CDMA) phones get released about a month later than carrier phones. It was my understanding that the Verizon phone is the same so is it still the case that I could order that one from Apple and take it to T-Mobile instead, and then try Verizon later if necessary? Since the new Intel modem offers support for both GSM and CDMA networks are the 2018 iPhones expected to do away with having different models for carriers?