I just got my SIM today and am ready to give T-Mobile a try. I still have my contract with Sprint so I'm a little unsure how to get this set up so that I can really try the network. I assume since my Sprint account is active I cannot port my number to T-Mobile. So how exactly would I go about testing the network for the phone side of things. Data I can test myself anytime. I don't want to have everyone I know change their contact info for me for it only to last a month or less if I don't like T-Mobile. I have Google Voice and have the Google Voice number as my current number. Will I get texts/voicemails through the app for my Sprint number? Can I port the number later if I want or do I have to get another SIM to do that?