ve gprs dung khong mat tien truy cap chi co 3 ly do rat don gian
(1) sim bi loi!truong hop nay rat it
(2)Doi voi viettel dung gprs3 thue bao 300000/Thang
(3)dung qua phan mem.nhung moi thang deu phai tra phi hang thang cho nha cung cap phan mem day.
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trang chu
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