AT&T iPhone 3G/3GS/4/4S/5/5S/5C/6/6+/6S/6S+/SE/7/7+ Premium Express
What does it mean to have an “active line IMEI” for the iPhone?
When you are paying a monthly fee to AT&T and your iPhone is active on the network, then you have an active line IMEI.
In most cases, your account needs to be in good standing by making your monthly payments on time and not reporting your device as lost or stolen.
Do you have a device that’s registered on the AT&T network and you’re not sure of its network status? We have a price comparison chart for you: the iPhone Network Finder. Using one of the featured services will remove any doubt about your iPhone’s IMEI or network status.