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  1.    #1  
    Will a phone unlocked for tmobile UK work with a US tmobile Sim??

    THanks in advance
  2. #2  
    Can't see any reason why it shouldn't. Apart from the frequency used, GSM is standardised worldwide
    Palm Vx -> Palm M505 -> Treo 180g -> Treo 600 (UK GSMrevA)
  3.    #3  
    Let me reword that question, it is locked for the tmobile in the UK, now will a US Tmobile SIM card work?
  4. #4  
    Ah... totally different question...

    But I'm a little confused, Do you have a 600 or one of the earlier models?

    If a 600 then as far as I am aware the only company in the UK doing those is Orange... if one of the earlier models then they aren't SIM locked at all... HOWEVER the 180 and 270 european models don't handle the frequency used in the US...

    Bottom line the only Treo that will work in both the UK and the US is the 600.

    IF you somehow have got a 600 locked to T-Mobile (or Orange or any company for that matter) in the UK then you can use the unlock patch (details found elsewhere on these forums) to be sure you can use it in the US. If you don't want to patch it, you can always call T-Mobile and ask...
    Palm Vx -> Palm M505 -> Treo 180g -> Treo 600 (UK GSMrevA)

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