need to unlock nokia 6230i

Would like to unlock my 6230i from tmobile to O2 if its possible

model 6230i
imei 357082003316814
network T-mobile
country Uk

any help would be greatly appreciated

 

#pw+138234055674440+7#

1. Insert a non accepted sim, most times it will show "Phone Restricted"
2. Press the UNDO option
3. You should see a box that says enter restriction code.
4. Enter the code given and then press (OK)

 

Worked perfectly you are a diamond thank you very much

 

Your welcome
Glad to help
Thankyou for letting me know