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Yes, once unlocked the phone will accept other GSM networks. To unlock, I suggest you can approach Mobileunlocksolutions.com and specify the country,locked network of Treo 650 Cingular.Based on the availability you can get the permanent unlock service along with free instructions.
Use the new At&t sim card in a Cingular phone? Hello, I am trying to find a good replacement phone for use with an At&t sim card. This is the new At&t merged with cingular. I want to know if the At&t sim will work in an treo 650 cingular phone...
Use the new At&t sim card in a Cingular phone?
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