15.7.1 won’t update

See >>> If you can't update or restore your iPad - Apple Support

If your iPad is capable of being updated to a more recent version of iOS/iPadOS than is currently installed, these support pages outline both the available methods by which the update can be performed - and troubleshooting should you experience difficulties:

Update your iPhone, iPad or iPod touch – Apple Support

If you can't update or restore your iPhone, iPad or iPod touch – Apple Support

If your iPhone, iPad or iPod touch won’t update - Apple Support

iOS update and restore errors – Apple Support

Be aware that while an iPad may be capable of update, in some circumstances you may need to use a computer to perform the update. To do so you will need access to either a PC (with iTunes installed) or a Mac (with iTunes or Finder - as appropriate for the installed version of MacOS). Ensure that your installed version of iTunes has been updated to the most recent version; the essential device drivers are included.

Download and use iTunes for Windows – Apple Support

Update to the latest version of iTunes – Apple Support

Update software on iPhone, iPad or iPod touch in iTunes on PC - Apple Support

If you don’t have access to a suitable computer of your own, that of a cooperative friend or family member will suffice. Otherwise, the technicians at the Genius Bar of your local Apple Store or Apple Authorised Service Provider will be delighted to assist:

Genius Bar Reservation and Apple Support Options - Apple

If you have a beta profile installed, ensure this has been removed from your iPad - as, otherwise, installation of production software updates may be inhibited. This support page provides the necessary information to remove the beta from your iPad:

How to uninstall iOS beta software - Apple Support

You should note that for your iPad to install an available update, its battery must be charged to at least 50% capacity - and/or be connected to its Power Adapter. Similarly, the iPad can only be updated over a standard WiFi connection - or be updated by a PC or Mac using iTunes or Finder - over a USB connection.

Make sure you are not connected to a VPN or proxy. If the update has been downloaded but won’t install, you can delete the update and try again by going to Settings > General > iPad Storage > iPadOS 15.7.1 and delete the update and re-install it again in Software Update.

If these don’t work, borrow a friend’s computer or go to the Apple Store.

I had the same issue. tried downloading 15.7.1 about 5 times, error. then i noticed at the bottom it said 16.1.1 is also available, that downloaded immediately. seems like an apple glitch….i believe 15.7.1 was already loaded. anyway 16.1.1 fixed it

Try free up memory

TY I’m sure that’s my problem. I’ll wait till it goes over 60%

I think they have stopped the updates on the iPhone 7

A 2019 iPad 7th gen can be upgraded to the latest iPadOS 16.1.1.

All iPhone 7 models/variants can only be upgraded/updated to iOS 15.7.1.