How long is it possible to use iOS15? [closed]

How long is it possible to use an iPhone with iOS15? I mean, how many time the iPhone 6s Plus works properly, can connect to main Apple services, like iCloud, findMyPhone, gets apps from the Apple Store without to be notified about something like "your device has an outdated operational system"

How long is it possible to use iOS15? [closed]

How long is it possible to use an iPhone with iOS15?

I mean, how many time the iPhone 6s Plus

  • works properly,
  • can connect to main Apple services, like iCloud, findMyPhone,
  • gets apps from the Apple Store without to be notified about something like "your device has an outdated operational system"