Unlocking your Cingular Treo 650 handset can be done using the remote unlocking method, which involves generating a phone-specific unlock code. After entering the code into the phone, the phone is immediately unlocked and ready to be used with other networks. To get the code, you must provide your phone's IMEI number (the phone's ID number) to a website that generates unlock codes. As of 2010, the code cost $33 to $59, depending on the website.
Instructions
1. Dial "*06#" on your Cingular Treo 650 while it is on. The IMEI number will appear on the screen.
2. Go to a website such as GSM Liberty, Cell Corner or The Travel Insider (see References). These websites provide unlock codes for Treo 650 models.
3. Specify the network carrier the phone is locked to, which in this case is Cingular/AT&T. Provide the IMEI number you found out in Step 1.
4. Enter your credit card details on the website and confirm that you want to purchase the code. The website will ask you to enter your email address, and tell you the estimated time you should receive the code via email. It usually takes 24 to 48 hours.
5. Enter the code into the phone while the phone is powered on with a non-Cingular SIM. As soon as you enter the code, you should see the message "SIM Restriction Off."
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