Forget your Passcode? Unlock with iTunes
Overview
Ever get frustrated when you forget your passcode? Get access to your phone using the following steps:
Step 1 - Connect your Computer to the iPhone
Do this with iTunes as it's the only way this will work.
Step 2 - Sync your iPhone First
Once connected, iTunes will sync your iPhone and backup of all your data automatically. Next restore your iPhone. This will then show you the various backups taken. Select the most recent backup.
Step 3 - Complete the Restore Process
After restoration use your phone without the passcode. If you want to temporarily bypass the passcode screen to access your contacts see this article.
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Enjoy this video to explore further