Thank you for posting and for reaching out to us with your question. Unfortunately, you would not be able to us a device from a different carrier on our network. The technology on that phone would not be compatible with our CDMA technology. Not to worry, you can always take part in our Sprint Buy Back program. With our program, you can trade in the device and use the amount given towards your new Sprint iPhone. For more information please visit: www.Sprint.com/BuyBack
I hope you found this information helpful. If you have any other questions please let us know. Thank you.
Sprint Social Care Team
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