1. *1673495 tapos dial
2. para set
3. update imei number
4. change imei into this ------> a864992024531967
5. Back to menu
4. Dial ###1111#
5. nck enter
6. use this code -----> 4917904896193488
7. press ok
8. sim card lock press ok then select off (phone will restart automatically)
9. Repeat step 1 to 3, type your original imei number.
10. Done!
