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I set a PIN screen lock on my Sony ST21i (Android 4.0) and forgot the code. No encryption, no root, and the phone won't show up a "Forgot PIN?" button. How to regain access to my phone? There is no important information in it, so any solution that deletes all data is fine. Help!

Edit: Didn't work:

  • Android Device Manager
  • Trying to boot into "recovery mode" using various key combinations found online

marked as duplicate by Ryan Conrad, bmdixon, RossC, Izzy, onik Feb 26 '15 at 8:19

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