I've been a tmobile customer for nearly 20 years - dating back to my very first cellphone on Omnipoint, which was later bought by Voicestream, which changed its named to T-mobile in 2002. Back then, only a GSM network was acceptable to me because I could switch phones by just swapping a tiny SIM card. CDMA carriers like Verizon didn't support that. Later, I stayed with Tmobile because of their terrific upgrade plan which gives me a new phone every six months, not every two years. You made the right move! Tmobile is the best!