Hello all. I've decided to sell my Galaxy Nexus and take the leap in to the wonderful world of iOS. As you can see, I'm coming from an unlocked GSM HSPA+ phone, so I'm not very knowledgeable about locked phones. My question is this: I have a blue AT&T locked iPhone 5c coming to me. I do NOT plan on renewing my contract with AT&T and will switch to Tmobile (unless AT&T decides to become "uncarrier" as well, but that's for another time). Will my iPhone 5c work on Tmobile, once I have it unlocked? And, not just work, but LTE data as well? Thanks for your alls attention! Looking forward to having my first iPhone!