It seems that while Apple has handled the issue on newer iPhones, the iPhone 5 may have been left out somehow
The company has been warning those users to update their devices to iO0.3.4
New Delhi: If you have an iPhone that was bought before 2012, you need to download Apple’s latest update as soon as possible. The company has been reminding users to download the update, particularly those who still use an iPhone 5 or iPad fourth-generation.
“Starting just before 12:00 am UTC on November 3, 2019, iPhone 5 will require an iOS update to maintain accurate GPS location and to continue to use functions that rely on correct date and time including App Store, iCloud, email, and web browsing. This is due to the GPS time rollover issue that began affecting GPS-enabled products from other manufacturers on April 6, 2019. Affected Apple devices are not impacted until just before 12:00 am UTC on November 3, 2019," Apple wrote on its support page.
The reason for this is something called the GPS Rollover, which can throw modern smartphones and other devices off their rocker. The issue doesn’t lie in a device, but rather how GPS -- Global Positioning System -- works.
When GPS was designed, the way the system maintained time was through week numbers. Instead of the day, month and year paradigm, GPS represents each week through 10-bit codes. And the system is set to return to zero whenever 1024 weeks are complete, which is roughly in every 19.7 years.
So, the time stamps on your GPS data suddenly rolls back to the first date for the current GPS era, that is August 21, 1999. As a result, the whole system faces an error whenever a GPS time stamp is required for any function, even if you don’t actually see the stamp on the front end.
It seems that while Apple has handled the issue on newer iPhones, the iPhone 5 may have been left out somehow. Hence, the company has been warning those users to update their devices to iO0.3.4 so that services like iCloud, App Store etc. do not stop working.
To be clear, Apple did rollout the iOS 10.3.4 and iOS 9.3.6 updates earlier to fix this issue, so it’s only a reminder to users that the update is now near-critical to ensure that their devices keep working.