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 The uses a dual-core model that is integrated with the Apple A5 SoC in the same way as the iPad 2. Apple claims that the has up to seven times faster graphics than the iPhone 4; this was corroborated by Epic Games president Mike Capps. The has 512 MB of DDR2 RAM. Maximum available storage size increased to 64 GB while the 32 GB and 16 GB model options were retained. The screen is the same as the prior generation iPhones; , 640×960 resolution (Apple's "retina" design). There was an improvement in interactive multimedia applications compared to its predecessor. The