To continue using email and web on iPhone 5, you need to update your OS by November 3rd

In order to continue using functions such as mail, web browsing and GPS with `` iPhone 5 '' released on September 21, 2012, it became clear that it is necessary to update the OS by November 3, 2019 It was.

Update your iPhone 5 to continue using App Store, iCloud, email, web, and other services-Apple Support
https://support.apple.com/en-us/HT210712

Update your iPhone 5 before November 3rd to keep email, web, and GPS working-The Verge
https://www.theverge.com/2019/10/30/20939840/iphone-5-update-gps-time-date-ios-10-how-to

After 21:00 on November 3, 2019 in Japan time, iPhone 5 will not be able to maintain accurate GPS information, and continue to use functions that depend on the correct date and time such as App Store, iCloud, mail, web browser etc. Apple has announced that it will no longer be possible. To fix this issue, you need to update your OS to iOS 10.3.4. The problem with iPhone 5 is due to the `` GPS time rollover problem '' affecting GPS compatible products that was revealed around April 2019, in the case of Apple terminals November 3, 2019 in Japan time It will not be affected by the problem until 21:00.

The GPS date field is assigned 10 bits, and unlike a general system that records dates in the format of the Gregorian calendar date, the date is calculated by counting the number of weeks. . In other words, since the concept of year and month does not exist, the date data broadcast from GPS increases by 1 every week, and since the field is 10 bits, it is reset to zero every 1024 weeks. In addition, this reset may disrupt the location information. After the GPS time started on January 6, 1980, the week number was reset once on August 21, 1999, and a second reset might occur soon, and the iPhone 5 may be affected. That is why.

According to Ars Technica of technology media, the GPS time rollover issue is affected by iPhone 4S, 1st generation iPad mini, iPad 2, 3rd and 4th generation iPads other than iPhone 5. That's right. However, even if you forget to update, functions other than those that are affected may continue to work. According to Verizon, an overseas mobile carrier, devices manufactured during the period from 2006 to 2016 are affected by the GPS time rollover problem, so a list of devices that may be affected is also included It is open to the public.

Global Positioning System
https://www.verizonwireless.com/legal/notices/global-positioning-system/

Fortunately, most devices can avoid the problem simply by updating the OS. If the update is not complete, the GPS time rollover issue will affect iCloud, and wireless updates and iCloud backup will not work. In that case, you need to restore your iPhone from a backup using a PC.

In addition, when a bug occurred on the iPhone clock at 12:15 on December 2, 2017, the situation that the terminal crashed multiple times . Similarly, Apple Watch also has a problem that the terminal crashes many times when a bug occurs in the watch, so users of the target terminal recommend that you update the OS.