Ax.. cua tui nhanh hon nek. Mjk can cai may androi.......
Mjk vao cai hinh gọi điện... nhan *#*#4636#*#*...... doi cai may androi cua mjk hien len 1 bag thog tin.. mjk an vao cai thong tin dien thoai va. Luot xuong bam vao cai ô dài nhat ma ban thay...... ban chon gsm only.....
Doi no chuyen tu mag H , H+ xuong 2g hay j do ( chu y. La phai bat mag di dong truoc nha...) sau do an vao gsm auto. Doi no chuyen thanh lai mang 3g H,H+ hay j do.. mien la cai hinh tren goc tro lai nhu cu khi ma mjk dag co mp toc do cao y