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  1.    #1  
    I've just been given a 650 by my nephew. I'm 2 months into a 2 year T-Mobile contract and would like to program the Treo to work with T-Mobile. I've had people tell me it can and cannot be done. I thought someone here might have the definitive answer. I tried just inserting my T-Mobile SIM and got an "incompatible" message.

    If it's possible, can someone tell me how?

  2. #2  
    Your Cingular Treo is locked.
  3. #3  
    You need to either call cingular (now AT&T) and request an unlock code for the phone or use an unlocking service such as the ones available on ebay. After that the phone should work on any GSM carrier.
  4. #4  
    Agreed with what the other's. I use my Treo just fine with T-Mobile (it is unlocked)

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