Does the iPhone on Straight Talk use Verizon or Sprint towers?

I wanted to know if the iPhone 4S/5 on Straight Talk uses Verizon or Sprint towers. Verizon is really good in my area, and I was thinking about getting the iPhone with them… But the cost is a little too much. Sprint in our area is pretty spotty so I wanted to see what carrier the Straight Talk iPhone has. I saw on Straight Talks website that it is CDMA and to NOT use a sim card.

ST uses multiple networks, Verizon, Sprint, T-Mobile and AT&T(recently stopped selling AT&T SIM) depending on the phone. From what I've known ST's iPhone runs on Verizon network. Contact their CS to be sure.

It totally depends, StraightTalk uses both Verizon and Sprint towers from area to area. If you've good Verizon reception in your area, StraightTalk is using Verizon then in your area.

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