iphone 4 locked and baseband is 4.12.2

[raven4d]

hello friends ,

i have an Iphone 4G with base band 4.12.2
and it's locked to a sweden courier .

can it be unlocked using turbo sim or another methode ?
is the base band have the ability to be downgraded ?

thank you

 

[miragebg]

No - to first question.
No to second question also.
Only IMEI unlock on your case..

 

[raven4d]

thank you very much !