Xin giúp sao m110s xach tay han quốc ko bật dc 3g

cua ban mat bo nho trong roi.cach ton tien la cai dat lai bo nho trong mat khoang 250k nhung duoc luon. cach ko ton tien nhung moi lan tat may ban lai fai cai dat lai. ban vao cai dat vao more cac-> mang di dong->access point name->tuy chon->apn moi->ten->v-internet->ok->apn->v-internet->tuy chon luu->ok

ban thu kiem mot fire exdialer.apk .mo root explorer vao thu muc chua exdialer.apk copy theo duong link system/app minh lam thu thay ok