I have a Verizon S4 that my aunt gave me since she's so nice (not really she owed me XD ) but I don't like Verizon and I have problems with them as well. But I noticed it has a sim Card Slot and it has the Setting to change to GSM. Before I do any of this, Is it possible to do it? Is there going to be something missing? I'm a high tech person but not when dealing with changing Carriers or doing something having to deal with Carriers. Well best Regards
~Elias