hello. on my nextel balckberry 7520, i and can't call people that are saved on the address book. it says errror, and tells me to call my service provider. however, if i manually punch in the numbers and call, it works. anyone have any solutions. thanks

Go into Call Log, Options, Smart Dialling and check the Country Code?

Also what format are the phone numbers stored as? When dialling form the address book, does the number appear in the correct format?