Step guide for Unc0ver
Step 01 – You should have downloaded & installed the Altstore on your PC. Then configure it on iPhone 12.
Step 02 – Tap on the download button to download the Unc0ver IPA (visit this page via your device safari browser) Let it finish the download. Then open the downloaded IPA via Altstore.
Step 03 – Provide your Apple ID & Password to sign the Uncover app and Altstore will sideload the App to your iPhone 12.
Step 04 – Once finished, you will see the Unc0ver app on your iPhone 12 homescreen. Launch the app.
Step 05 – Tap on the jailbreak button and complete the jailbreak process. Cydia will appear on your iPhone 12 home screen once done.