updated 11:50 am EST, Tue November 24, 2009
May be connected to firmware
Some iPhone owners are still suffering from an issue preventing any kind of cellular connection, posters on Apple's support forums say. After entering an area with no carrier service, or simply at random, an iPhone may launch into a "searching for service" mode from which it does not return, even when back in a known coverage area. The only way of temporarily fixing the problem is said to be rebooting a phone.
Although some suggest the fault may lie with carriers, or phones without the latest carrier updates, others argue it is instead connected to the iPhone firmware. Disruptions allegedly began with the iPhone 3.1 update, and have persisted with v3.1.2. Posters also note that the issue can occur across multiple phones, and multiple carriers, such as AT&T, Telus and Rogers. Neither carriers nor Apple have reportedly been able to find a solution.