bạn ơi. minh có phương pháp unlock bằng code đây.
Unlock codes:
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UNLOCK NETWORK LOCK: #7465625*638*42463804#

Enter codes WITHOUT simcard inside the phone.
You can check the current lock status using this code: *#7465625#

UNFREEZE PHONE: 47295171 + OK

Enter the code WITH simcard inside the phone when "Phone Freeze" warning is displayed (no entered digits will be displayed).
chúc thành công nhé.