How do I fix my iPad mini

If you already tried (to no avail) ALL the steps provided in this support article (even if related to iPhones, the steps are the same):--> If you can't activate your iPhone - Apple Support, contact Apple Support directly, using this link:--> Get Support

Regards

Giulio

If your are experiencing difficulties (re)activating your iPad, you may have greater success if you connect your iPad to a PC (with iTunes installed) or a Mac (with iTunes or Finder - as appropriate for the installed version of macOS). Once connected to your computer, your iPad will be detected - and you should be able to activate using iTunes.

1. Make sure that you have the latest version of macOS or the latest version of iTunes.
2. Check that your computer has an Internet connection.
3. With the cable that came with your iPad, connect your iPad to your computer. Locate your device on your computer.
4. Wait while your computer detects and activates your iPad:

• If you see an alert that shows "Set up as New" or "Restore from Backup", it means your iPad is activated.
• If you get an error message that says the "activation information was invalid" or "activation information could not be obtained from the device", use recovery mode to restore your iPhone.

A restart of your WiFi Router and/or a change of DNS settings may be helpful.

To restart you home router, disconnect power - then wait at least 30 seconds before restarting. When you router has rebooted (which may take several minutes), force-restart your iPad:

• On an iPad with a Home button: Press and hold the top button and the Home button at the same time. When the Apple logo appears, release both buttons.
• On an iPad with Face ID: Press and quickly release the volume up button, press and quickly release the volume down button, then press and hold the top button. When the Apple logo appears, release the button.

For recommended DNS servers (configured at your home router and/or your iPad), you might choose one of the following Recursive DNS Providers (IPv4 and IPv6 addresses included below):

Quad9

9.9.9.9

149.112.112.112

2620:fe::fe

2620:fe::9

OpenDNS

208.67.222.222

208.67.220.220

2620:0:ccc::2

2620:0:ccd::2

Cloudflare+APNIC

1.1.1.1

1.0.0.1

2606:4700:4700::1111

2606:4700:4700::1001

Should it be necessary to escalate your issue to Apple Support, the quickest route to engaging with Apple Support will be via the  Get Support link at top-right of this page.

If you have not used this iPad in a very long time and this is a very old iPad from 2011 and 2012, you may have issues with this device, at this late timeframe.

This issue has mostly affected iPad 2 models with SIM cards for Cellular data service.

If you have a cellular iPadmmodel, try removing the SIM card from the SIM card tray, located on one of the long sides of the iPad ( you may need something small or pointy or the original SIM card tray tool that came with your Cellular service iPad 2 to open the tray ), remove the SIM card, try either a simple restart of your iPad 2 AND/OR try a hard reset of your iPad by holding down both the Home and sleep/wake buttons simultaneously until your iPad goes to black and restarts with Apple logo, then release the buttons.

Then, try re-activating your iPad 2 without the SIM card in the tray.

If successful, return the SIM card back into the tray.

If no joy,

Leave the SIM card installed, first, and try to re-activate your iPad 2 with it connected to a computer running iTunes.

If STILL no joy,

Try taking out the SIM card and try the re-activation with your iPad 2 connected to the computer and iTunes, once again.

Possible solution WITHOUT a SIM card (WiFi ONLY iPad ).

Connect your iPad to a computer running the latest iTunes.

Force your (still plugged-in) iPad to restart by pressing and holding the power (Sleep/Wake) and Home buttons at the same time. Keep holding them down until you see the Recovery mode screen. You probably need to keep holding these down for longer than you think: the screen will go black then after a few seconds, and the Apple logo will appear, but you need to keep holding the buttons for another 10 seconds or so before the iPad goes into Recovery mode.

You'll be given the option to restore or update in iTunes. Select Update.

iTunes will now try and attempt to reinstall iOS 9.3.5.

If the update process takes more than 15 minutes, your iPad will exit recovery mode, and you'll need to repeat the above step.

Some other users here reported seeing the error message again during this process, but says you should ignore it and wait.

After the update is finished, leave your iPad connected to the computer. You'll now need to complete the activation setup process for your iPad using iTunes.

IF still no joy at this point, leave your iPad connected and force another restart of your iPad as I described earlier in this reply post.

This time your iPad should ask if you want to restore it.

Once the restore is finished, you will be asked to select whether you want to activate the iPad as a "new" device or if you want to restore it from your last backup. Selecting the new iPad option will format your iPad so it is like new and restoring it will retrieve your data again.

Good Luck to You!