Re: Dell Venue Pro - is it truelly Locked Phone? Cannot use ATT SIM card. And Cannot Update to Mango

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Dell Venue Pro - is it truelly Locked Phone? Cannot use ATT SIM card. And Cannot Update to Mango

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Hi,

I recently got the T-mobile version of Dell Venue Pro, and it was just unlocked by Dell Rep.  ( I have to called a few times before one of them can do it for me.  It really bad that Dell is marketing unlock and not providing the code easily.  Additionally, not informing the tech support rep to provide easy access to the unlock codes )

Anyway, it seems my phone is unlocked, or so it seems.  (note: currently I am in US)   However, when I put in a local Pre-paid ATT SIM in the phone, it shows invalid SIM card.   I know the 3G Data band for ATT and T-mobile is dfferent.  I only need the voice service to work.      It works when I put in a foregin country SIM card in the phone.    What is this?   can someone explain to me?   or it is Dell's problem?

Thanks

 

 

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