Can you turn on an iphone with a prepaid contract?

I'm trying to buy an iphone and keep my same prepaid plan

There are a few providers that are now offering a bring your own phone option for prepaid cell phone plans.

Net10 and Straight Talk now allow you to bring your own phone to their network. The phone must be a unlocked GSM, AT&T, T-Mobile phone, excluding Blackberries.

Verizon, Sprint and any CDMA phones will not work with this program.

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