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
mobileunlocksolutions
Here 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
once you got the codes you can get the instructions about how to use the codes in your
mobile from here
mobileunlockguide here they provide you the step by step procedure about
how to enter the codes. then your mobile get unlocked and it accepts any network sim.