I have a iphone 6 running verizon up to 4g LTE service. I read somewhere that if I put my CDMA sim card into a GSM unlocked phone 4g and only 4g will work. Is that true? I really dont mind only having access to 4g due to the fact 3g is too slow to be used for me. Im looking into getting a budget android phone to use for things that may break my iPhone.