How to get uncOver jailbreak to work. Most likely.
1. Make sure your iOS version is jailbreakable by unc0ver. Make sure you do not have Electra on your device. Electra interferes with the jailbreak.
2. Get unc0ver app from ignition.fun or use cydia impactor to download it from a pc
3. Turn on airplane mode
4. Disable your passcode
5. Shut down/Restart once, If you stay on airplane mode, you do not need to repeat this step
6. Open unc0ver app and leave the app on or in the background for 2 Minutes, then press jailbreak
7. If your iDevice reboots after 1, wait a few minutes before trying again
8. Keep trying, If it does not work after 5 attempts, shut down again and turn on your device after 10 minutes.
9. Try again and it should work. Happy jailbreaking!
Alternatively, you can use Sideloadly!
I hope this helped you!