Apple just suddenly opened the iOS sign for iPhone devices, the old iPad after many years stopped production and stopped supporting OS.
Thereby iPad 4 is also updated to iOS 10.3.4
Thereby, iPad 2, iPad 3 and iPad Mini 1 are also supported iOS 9.3.6
Those of you who are using the old device mentioned above should go Settings (Settings) – General settings (General) – Software update (Software Update) to continue upgrading the new OS and don't be afraid because this is an official OS from Apple.
Apple also said that in November this year, iOS devices from 2012 and earlier will be limited in their ability to identify GPS. These updates are intended to correct GPS positioning errors and time (date, time) on older devices.