i bought blackberry 7250 from usa on auction, the phones comes with no cd. the phone also come with verizon network which we are not usng here in Tanzania. the only provider of CDMA system of network is TTCL, ZANTEL and SASATEL. MY PROBLEM IS , i want to change from Verizon to one of the company i mention above. those company they fail to connect me to theire network because they said there are driver missing like installation CD. Please help me what to do so that i can use them here in Tanzania. the phones are used ones.