How to Unlock an ATT Tilt Passcode for Free

1. Check that your contact has been in good standing for at least the last 90 days (no late payments). You can also call AT&T customer service to determine your contract status.
2. Remove the battery from your phone. Write down the 'IMEI' number shown on the sticker attached to your Smartphone. Put your battery back on the phone and close the battery cover.
3. Call AT&T customer service. You can find your local customer service number on their customer service web page. You can also dial *611 from your phone.
4. Provide the customer service representative with your account number, your password when applicable and your phone's manufacturer (HTC or AT&T) and model (Tilt).
5. Write down the unlock code exactly as provided. If you are not calling from your phone you can also enter the information when the representative is on the phone with you. However, it is recommended that you write down the process.
6. Enter the code exactly as you have written it down. The phone will reset itself. Insert a new SIM card from another carrier and wait 15 to 20 seconds. If the phone displays signal strength from your new carrier it has been successfully unlocked. Repeat the process if no signal strength is displayed.