Yes you can .. I use to have BB 8830 from sprint .. I still have it ..
the sim comes unlocked .. I went to Bangladesh and use there sim card it works fine.. I upgraded this phone cause it has same features .. I am going next month again cant wait.. And planing to use my tp2 cant wait...
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Present- Sprint TP2 & Iphone 3Gs
Past- Samsung Instinct, BB 8830 world phone,
Treo-700wx, Samsung A800, and few more dont remember..