Update ios 12.3.1
Hello , i cannot update my ios from 10.2.1 to 12.3.1 , if i try to update from phone always cannot succes . Im used iphone 6s plus .
can you help me
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If you've tried to do it wirelessly, see this support guide:
Get help with over-the-air iOS updates - Apple Support
If the issue still persists, update your device via iTunes on a computer, following the steps provided in this guide, at section "Update your device using iTunes": Update your iPhone, iPad, or iPod touch - Apple Support
If you don't have a computer, borrow one from your friends, or ask for help at an Apple Store or Authorized Service Provider: Apple – Location Selector
Regards
Giulio
