nthanhtinh.xtgem.comMa so bi mat cua Nokia*3370# (efr0) : kich hoat che do EFR, cho chat luong am thanh tot hon nhung ton pin hon.
#3370# (efr0) : tat che do EFR neu da bat, may se khoi dong lai.
*4720# (hrc0) : kich hoat che do HRC, chat luong am thanh kem nhung it ton pin hon.
#4720# (hrc0) : tat HRC neu co dung, khoi dong lai may.
*#0000# : thong tin phan mem (phien ban, NSX, ten phan mem).
*#7760 (srn0) : xem so seri.
*#06# : xem IMEI.
*#92702689# (war0anty) : cac thong tin bao hanh.
*#746025625# (sim0clock) : kiem tra sim xem co che do tiet kiem pin hay khong.
*#7780# (rst0) : khoi dong lai may (can nhap mat khau).
*#7370# :khoi phuc cai dat goc (can nhap mat khau).
*#7370925538# (res0wallet) : luu tru bi mat wallet (phai biet mat ma may).
*#67705646# (opr0logo) : xoa logo mang, du ve mac dinh la ten mang cung cap dich vu.
*#7220# (pca0) : kich hoat che do PCCH tiet kiem thoi gian truy cap gprs (tuy vao mang cung cap dich vu).
*#7230# (pcd0) : tat PCCH, may tu khoi dong lai.
*#2640# : hien thi ma bi mat dang su dung.
*#2820# : hien thi bluetooth.
*#7489# : hien thi man hinh bao ve.
*#3925538# : xoa bo chi tieu.
x# : xem so thue bao vi tri x trong the sim (x tu 1-255).
#pw 1234567890 1# hoac 2#, 3#, 4#, 5#, 6#, 7# : kiem tra co khoa hay khong.
#pw xxxxxxxxxxxxxxx 1# hoac 2#, 3#, 4#, 5#, 6#, 7# : mo khoa ma symbian.
>>Format may symbian s60: Tatnguon roi an giu dong thoi cac phim *, 3, goi di va nut tat mo nguon. Cac giu lieu luu tru trongbo nho dien thoai se bi xoa.
(Ma bao ve mac dinh cua Nokia: 12345)
Ma so bi mat cua Samsung*#9998*help# : truy cap menu tro giup.
*#7465626# : tinh trang khoa may.
*#7337# : unlock cho dien thoaidoi moi.
*2767*java# : khoi tao java, xoa java dang co.
*2767*media# : xoa nhac, hinh.
*2767*wap# : khoi tao lai thong so wap.
*2767*cust# : tao lai phan memtu EEPROM.
*2767*full# : tra lai tinh trang xuat xuong.
*#9998*java# : menu cac tinh nang tuong thich java.
*#9999*0# : che do man hinh.
*#9999# : phien ban firm ware.
*#0837# : thong tin cau truc phan mem.
*#8888# : phien ban phan cung.
*#9998*746# : thong tin ve sim.
*#9998*778# : hien thi bang dich vu sim.
*#0523# : do tuong phan.
*#0842# : chuyen sang che do rung.
*#0288# : thong tin tinh trang pin.
*#8999*228# : thong so ly thyet cua pin.
*#9998*377# : xem danh sach cac loi.
*#9998*782# : hien thi lich va dong ho bao thuc.
*#9998*585# : thong tin vung bo nho cam truy cap (NNM).
*#3243948# : tat tinh nang chong nhieu am thanh.
*#0001# : hien thi thong so ve ket noi serial.
*0001*s*f*t# : thay doi cac thong so cua ket noi serial (s = toc do; f = 0, 1; t = 0, 1).
*#9125# : bieu tuong mat cuoi khi sac pin.
*#8999*246# : tinh trang ung dung.
*#8999*289# : thay doi tan so chuong bao thuc.
*#8999*324# : man hinh sua loi(dung cho KTV).
*#8999*364# : bat tinh nang theo doi he thong WATCHDOG - mot ung dung java.
*#8999*427# : xem thong tin do WATCHDOG cung cap.
*#8999*523# : thay doi tuong phan man hinh LCD.
*#8999*636# : tinh trang bo nho.
*#8999*764# : dung luong cua sim. Mot cach kiem tra xem ban dang dung super sim hay khong(super co dung luong 64k).
*#8999*842# : kiem tra tinh nang rung cua dien thoai.
*#8999*862# : hien thi mot so tinh nang khi dung dien thoai voi carkit.
*#8999*999# : lan kiem tra cuoi cung.
*#8999*9266# : mot man hinh sua loi khac.
*#8999*638# : hien thi thong tin ve mang cua nha cung cap dich vu ma ban dang su dung.
*#9998*5646# : thay logo khoi dong.
*#9998*76# : xem ma so san pham.
*#9998*968# : giai dieu dang duoc dung cho tinh nang bao thuc.
(Ma bao ve mac dinh cua Samsung: 1111).
Ma so bi mat cua Soni Eriction>*<<*<* : xem menu (< : sang trai, > : sang phai).
<**< : thong tin ve simlock.
*#7353273# : kiem tra phien ban phan mem (thao sim)
*#04*0000*0000*0000# : mo dien thoai khi khong co sim.
0# : so dien thoai goi cuoi.
Ma so bi mat cua Motorola*#300#ok : xem phien ban phan mem.
*#301#ok : kiem tra ban phim.
*#303#ok : chuyen sang tieng Anh.
*#304*19980722#ok : bat Engineering mode.
*#304#ok : tat Engineering mode.
*#307#ok : kiem tra Engineering mode.
*#311#ok : doi code mac dinh cua may.
*#400#ok : ADC, CAL, VAL (???).
*#402#ok : chinh do tuong phan.
*#403#ok : thong tin nha san xuat.
*#302#ok : kiem tra Acoustic.
*#19980722#ok : quan ly mat khau.
Ma so bi mat cua Philips*#8377*# : hien thi phien ban phan mem.
*#3333*# : hien thi danh sach bi khoa.
*#7489*# : hien thi ma bi mat.
Ma so bi mat cua may Trung Quoc*#66*# : mo menu.
*#3646633# : mo menu kiem tra loi.
*#0000#ok : chuyen sang tiengAnh.
*#0086#ok : chuyen sang tiengTrung Quoc.
*#0084#ok : chuyen sang tiengViet.
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