What iPhones are compatible with the Tracfone BYOP?

So I'm looking at buying a used iPhone 6 off ebay and i'm wondering what carrier will be compatible with tracfone. I know that tracfone has a place to check compatibility with the IMEI number, but since I don't have the phone I can't check that. Will sprint work on tracfone? Will AT&T?

Tracfone lets you bring UNLOCKED GSM and CDMA phones to their service. Previously they only allowed CDMA 2g/3g but now also allow 4G/LTE.

Wait until you receive your phone and then check the MEID here
http://tracfonewireless.com/byop/

I too am wanting to get an iPhone 6 to use with tracfone. My friend has one he used with Verizon and is willing to sell to me. Will it work?

Can you do Trackphone on a I phone 8?

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