Apple has released a warning document on its support site for owners of older iPhone and iPad models.
We are talking about models introduced in 2012 and earlier – iPhone 5 and iPad 4 generations, as well as iPhone 4s, iPad mini first generation, iPad 2 and iPad 3.
For iPhone 5 and iPad 4, you need to make sure that iOS 10.3.4 software is installed on the device, and iOS 9.3.6 for all others. Note that the problem does not apply to iPad with Wi-Fi support only.
From November 3 after 15:00 Moscow time, these devices without updated software may begin to experience problems with functions related to geolocation.
As Apple explains, starting November 3, 2019, these models will require an iOS update to accurately determine the location using GPS navigation and display the date and time correctly. This is due to the GPS time transfer issue, which began to affect third-party GPS-enabled products on April 6, 2019.
If you do not upgrade iOS to the latest version available for the device before November 3, then the location determined using GPS navigation may begin to display incorrectly. At the same time, functions that depend on the correct date and time may not work, such as synchronization with iCloud and downloading mail.
In addition, devices not updated before November 3 may not be able to receive software updates wirelessly. As a result, the only way to update your device is to restore it in iTunes or Finder.