i bought my black razr a couple months ago brand new off ebay. i put my sim card in and it worked great until today. it says it has service and has a couple bars but i can't send messages and all calls fail. i have cellular one which uses cingulars network. it also has DCS by my service provider on the screen. no other cell one user has those letters. this also happened to the v600i i had. almost the same exact thing and when i go outside my area it worked perfectly again. if anyone knows how to fix this please help. thanks

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