The iPhone 5, the model with the Apple adopted the 4-inch screen, stopped updating with iOS 10, although it could have done so much earlier since its operation with this version of iOS leaves a lot to be desired. The last version of iOS you received was 10.3.3.
However, it is not the last update that this device has received since a few months ago, the Cupertino-based company released a new update,number 10.3.4, an update that needs to be installed if we do not want our terminal to stop working from November 3.
On Apple's support website, we can read:
IPhone 5 will require an iOS update to maintain an accurate GPS location and continue to use features that depend on the correct date and time, including the App Store, iCloud, email, and web browsing. This is due to the GPS time extension issue that began to affect third-party GPS-enabled products on April 6, 2019. Affected Apple devices will not be affected until just before 12:00 am. UTC November 3, 2019
If you still keep or use an iPhone 5 on a daily basis, you should have already updated your device. If you are reading this article after that date, there is no major problem, since you just have to make a backup of your terminal and connect it to a PC or Mac to restore your device to iOS 10.3.4 latest version currently signed by Apple for this device.
As of November 3, You will not be able to update via OTA the iPhone 5 to this version of iOS Since the Over The Air updates as well as the iCloud backup will stop working. To make sure you have the latest version of iOS for the iPhone 5, you just have to go to Settings> General> Software update.
Also applies to iphone 5C?