Replacing cdma chip iphone 4 sprint?

I have a sprint sanyo scp-3810 and i recently purchased an iphone 4 sprint. I was wondering how to transfer my CDMA card from my current phone to my new one and if i would receive a data charge since my current plan is talk only and I have Wi-Fi at home and at school so I don't really need the data? Any information would be appreciated.

You can't interchange "CDMA cards" between phones, as they do not exist. You are thinking of SIM cards which are not used by Sprint phones to establish usage of a phone.

If you want to use an iPhone on a Sprint plan, you will need to have a data plan. There are no legal ways to make the iPhone work with your current non-data plan at all.

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