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 4S announced, it was considered by some media to be a disappointment, due to the expected release of an iPhone 5. There were no external differences between the iPhone 4 CDMA model and the , with the exception of a SIM card slot on the . All changes were internal (slight external differences between the iPhone 4 GSM model and the exist, as said differences existed between the CDMA and GSM models of the iPhone 4). On September 10, 2013, the iPhone 4S name was re-stylised as iPhone 4s, using a lower case 's' to reflect the names of the newly