hi restriction codes is nothing but the code which is used to remove the lock in your mobile.
there are many online sites found nowadays that provide the unlock codes .i got the unlock codes to unlock my mobile
from here wickedunlock
here they ask the following details before providing the codes they are mobile model,country and the provider to which the mobile
is locked .finally they ask the imei number of the mobile .after that they send you the codes to unlock your mobile.