hi restriction codes is nothing but your mobile is locked to particular network.due to this it accepts
only the particular Sim when ever other network Sim is inserted it shows Sim restricted .there are many ways
to solve this problem we can use software,cable ,codes etc....among them codes are the best .to get the codes
you can visit here
mobileunlocksolutionsHere they ask the following details before rendering the unlock codes they are
1. Mobile model
2. Country from where you brought the mobile
3. Provider to which the mobile is locked
4. Imei number of the mobile
Finally they will send you the unlock codes .once you entered the code in your mobile as
for the instruction given by them .your mobile get unlocked and it accepts any network sim.