I want to know how to undo this so the phone will be locked again.

1. put non accepted sim card to phone
2. make full eprom reset (*2767*3855#)
3. enter this code to change the nck code to (00000000)
(*7465625*638*00000000*00000000#) enter
4. to permanently unlock the phone enter this code
(*7465625*638*00000000#)
5. check the phone lock status (*#7465625#)...enjoy ur phone r unlock
……………………………

plz tell me how to undo it...

thanx

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