This might help you out.
Apple on Friday launched a repair program for iPhone 7 devices that are impacted by an ongoing bug that causes them to have no available service even when cellular coverage is available. Apple says the problem is caused by a component that has failed on the main logic board.
The company has stated that the issue affects “a small percentage” of iPhone 7 devices and causes them to display a “No Service” message instead of properly connecting to an available cellular network.
iPhone 7 owners experiencing this issue can receive a free device repair from Apple. If you’ve already paid for repairs, you’re eligible for reimbursement. Apple will be emailing customers who may have previously paid for a repair related to this problem to offer a refund.
Apple has stated that affected units were manufactured between September 2016 and February 2018 and were sold in China, Hong Kong, Japan, Macao, and the United States. Model numbers that are impacted by the hardware failure include A1660, A1780, and A779, and customers can see if they are affected by checking the model number on the back of their device.
The repair program is only available for the iPhone 7, and Apple will have to examine all users prior to service to verify the device’s eligibility. If you have other damage, such as a cracked screen, these issues will need to have those problems addressed before the “No Service” bug can be fixed.
Customers who are in need of a repair should contact an Authorized Apple Service Provider, visit an Apple retail store, or get in touch with Apple support. Apple will be sending all iPhone 7 models in need of repair to an Apple Repair Center.
The new iPhone 7 repair program covers affected iPhone 7 devices for two years after the first retail sale of the unit.
Stay tuned for additional details as they become available.