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  1.    #1  
    I put my new 3G SIM in a GSM Treo 600 and it says no service. What do you think the trouble could be?

    Is the phone to old? Is the SIM to new? Maybe its a GSM Treo that is no good for AT&T?
  2. #2  
    Don't know why it would not work. I will check later with my nephew, he's got AT&T and I have a Treo 600 that's unlocked.
  3. #3  
    Quote Originally Posted by jamespaulritter View Post
    I put my new 3G SIM in a GSM Treo 600 and it says no service. What do you think the trouble could be?

    Is the phone to old? Is the SIM to new? Maybe its a GSM Treo that is no good for AT&T?
    The 600 would not be capable of 3G.
  4. #4  
    Even if it is not capable of 3G, does that mean you can't even get phone signal at all?
  5.    #5  
    I have several GPRS phones that work just fine for data and voice with my 3G SIM
  6. #6  
    Just to confirm, I borrowed my nephew's 3G AT&T SIM card and yes, it does work with the Treo 600 for voice and data.

    The data is standard GPRS speed recorded in dslreports mspeed for 33Kbit/sec, 1.572s latency 25.297s d/l time for 100k.

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