Apple is reportedly investigating a problem affecting the iPhone 7 and 7 Plus that causes the devices to lose cellular access after a person turns off Airplane Mode.

As a stopgap, the company is telling authorized service providers to recommend owners reboot their iPhones, according to internal documents obtained by MacRumors. Should that fail, Apple is suggesting that people re-insert their SIM cards, though it may be willing to replace iPhones in some cases.

Complaints about the problem are growing. An AppleInsider reader noted that his AT&T-based iPhone 7 went into "no service" mode nine times on Sunday, and that the carrier's support staff said they're getting a number of similar calls. A support representative suggested that the issue may be attributable to the iPhone 7's SIM tray, which could be allowing cards to shift enough to lose contact.

Reaching out to an Apple retail source, AppleInsider was told that "most, if not all" of the ongoing problems with Airplane Mode may actually be attributable to a "slightly askew SIM."