Text Message From ATT after moving SIM Card from 5S
I purchased a contract free iPhone 6 Plus and used the SIM card from my contract-free iPhone 5S. I have AT&T. Everything seems to be working just fine but then I get this text message from AT&T:
"ATT Free Msg: Your new device requires a new SIM card to give you access to all services. Please visit your local AT store to get a new SIM. Thanks."
Has anyone else gotten a similar message? Does anyone know what services I would be missing access to? Both phones use a nano-SIM and are LTE based. Is the new SIM really necessary?
Thanks,
Rob