IPhone 7 lock that prevents individuals from attempting to replace the home button on their own. Users are now required to go to an Apple Store to have repairs done, with "recalibration" of the button being necessary. This is a step further than Apple went with iPhone 5S, 6 and 6S, where only Touch ID functionality would get disabled but the "return-to-home" functionality still worked. Some iPhone 7 devices with the model numbers A1660, A1779 and A1780 suffer from a problem where they show a "No service" message even when cellular reception is available. Apple will repair those devices for free within
IPhone 3GS standards in the countries the 3GS was released. After the release of the iPhone 4S, the 3GS was still offered for free on contract until November 2011, when AT&T raised the price to 59 cents with no explanation. The 99¢ price was only available with a two-year contract on AT&T in the United States and a three-year contract on Telus, Rogers, Bell and Fido Solutions in Canada. This was a departure from Apple's previous trends, in which only two phones were sold. On September 9, 2009, Apple launched an updated model of the iPhone 3GS that patched a segment overflow