Could use a little help, unable to find an answer anywhere. I recently sold my 32gb Verizon iPhone 5 on Ebay, the buyer is also a Verizon user. When they put their SIM in the phone, under the About settings, it's showing the carrier is AT&T. They sent me a photo showing this. They're asking for a refund, thinking I lied on the listing. Is there anything that can be done to help? Thank you!