When I upgraded from iPhone 4S to iPhone 6, I was on AT&T. As a “reward” for upgrading, after being a loyal customer (“We want to thank you for being the best part of AT&T”), AT&T charged me $40 and then increased my monthly data plan by $15. And locked me into the full plan for 24 months. I had a hellish experience but was able to cut my monthly costs drastically by unlocking and then switching to T-Mobile. Here’s how I did it… [Read more…]