I am currently using straighttalk. I am purchasing a Samsung Galaxy S4 (used/ refurbished) and unlocking it. Then will be using it for straighttalk. Once unlocked what towers does it go off of? Don't know if it matters what carrier i buy it from if i am just unlocking it. I am curious because AT&T does not get good service where I live and Verizon does.
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What towers do unlocked phones go off of?