These day SIM network locking problem is common , Mostly it arise when you buy the phone in one country and you use same new phone in other country in other network sim it shows message SIM network unlock PIN . It arise only if you not use the same phone in buying country. If you search internet you will find many website who provide SIM network unlock pin by charging money through online payment but I will show you the procedure and ways how to get SIM network unlock pin for free. There 3 ways you can choose any one according to your convenient.
1. Take the phone to the same country mobile network where you bought the phone and use some time for incoming and out going calls like 5 to 10 minutes . Then it will work in any network sim and it new network sim required pin then you can use sim pin.
2. Contact to mobile phone dealer of same country where you bought the mobile phone and provide them the IMEI code and SR No of your phone with your contact number and invoice detail. They will provide you SM network unlock pin for free. For this no need to take phone to the country and you can doe by your friend or relative even you are out side the buying country.
IMEI code and SR. No you can get when back side of your phone after removing battery. Of if you dial on your mobile *#06# and press the call button you will get the IMEI code.
3. How to get “sm network unlock pin” online free: First get your phone IMEI code by dialing *#06# then click the following button and put your mobile IMEI code and select the model
I hope this information is useful for you it is free information . If you find useful please help others by sharing.