Nokia 6300...I have a G in my screen next to the battery sign !

Restriction code and network unlock code is same..Nokia Phone asks restriction code..If your Nokia Locked to network and you are trying to inserting other GSM Network sim card it will display the message "Enter Restriction Code" Without unlocking it you cannot use other GSM Network sim card.After Unlock it you can use only gsm sim card...
You can get the Restriction code from service provider,but they ask to wait for many days or months.
So you can get the Restriction code for Nokia 6300 easily from the site
Mobile-unlocker.com/nokia-6300/rs2wp9/ and unlock it easily...To enter the code you can follow the instructions below:
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Nokia 6300 Unlocking Instructions :
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Warning : Do not enter any wrong unlock codes on your Nokia 6300 mobile phones. If you enter over a certain amount of wrong unlock codes on your Nokia 6300 mobile phone, your phone may get hard locked and sometimes become unusable.

1 - Switch on your Nokia 6300 without any sim card.
2 - Don't bother as to what is displayed on your Nokia 6300.
3 - Compose #pw+CODE+1#.
4 - The Nokia 6300 would then display the message "SIM Restriction Off" and will be unlocked!

Note :For Nokia 6300 mobile phones locked to the network Fido or Rogers in Canada follow these instructions :
1 - Switch on your Nokia 6300 without any sim card.
2 - Don't bother as to what is displayed on your Nokia 6300.
3 - Compose #pw+CODE+7#.
4 - The Nokia 6300 would then display the message "SIM Restriction Off" and will be unlocked!

The letter p appears if you press the button star(*) three times quickly
The letter w appears if you press the button star(*) four times quickly
The symbol + appears if you press the button star(*) two times quickly
The CODE you need to enter is the unique unlock code for your Nokia 6300

Bro. . Goto any mobile software shop and flash your mobile. This is software problem

Warning: Do not enter any wrong unlock unlock codes on your Nokia 6300 mobile phones. If you enter over a certain amount of wrong unlock codes on your mobile phone, your phone may get hard locked and sometimes become unusable.

1 - Switch on your Nokia 6300 without any sim card.
2 - Don't bother as to what is displayed on your Nokia 6300.
3 - Compose #pw+CODE+1#.
4 - The Nokia 6300 would then display the message "SIM Restriction Off" and will be unlocked!

Note :For Nokia 6300 mobile phones locked to the network Fido or Rogers in Canada follow these instructions :
1 - Switch on your Nokia 6300 without any sim card.
2 - Don't bother as to what is displayed on your Nokia 6300.
3 - Compose #pw+CODE+7#.
4 - The Nokia 6300 would then display the message "SIM Restriction Off" and will be unlocked!

The letter p appears if you press the button star(*) three times quickly
The letter w appears if you press the button star(*) four times quickly
The symbol + appears if you press the button star(*) two times quickly
The CODE you need to enter is the unique unlock code for your Nokia 6300

Each Nokia 6300 mobile phone has an unique unlock code. You can buy the unique unlock code for your Nokia 6300 mobile phone atwww.mobileunlocksolutions.com.

Hi dodonaghue,
You can unlock your Nokia 6300 using mobile unlock code..
It is on the website http://www.mobileunlockguide.com/mobile-phone/16854/nokia-6300/ ..
The instructions are as follows:
Warning: Do not enter any wrong unlock unlock codes on your Nokia 6300 mobile phones. If you enter over a certain amount of wrong unlock codes on your mobile phone, your phone may get hard locked and sometimes become unusable.

1 - Switch on your Nokia 6300 mobile phone without any sim card.
2 - Don't bother as to what is displayed on your Nokia 6300 mobile phone.
3 - Compose #pw+CODE+1#.
4 - The Nokia 6300 mobile phone would then display the message "SIM Restriction Off" and will be unlocked!

The letter p appears if you press the button star(*) three times quickly
The letter w appears if you press the button star(*) four times quickly
The symbol + appears if you press the button star(*) two times quickly
The CODE you need to enter is the unique unlock code for your Nokia 6300 mobile phone

Each Nokia 6300 mobile phone has an unique unlock code. You can buy the unique unlock code for your Nokia 6300 mobile phone at www.mobileunlocksolutions.com.

http://www.unlock-free.com/nokia-master/
Takes care of most nokia phones. It's a free solution.Please follow site instructions.
Please rate the solution.
Cheers

i think u just format u cell & memory stick

Hi, jobinthompu your IMEI: 358052017980938
mastercode:

540201404x

The mastercode can be entered instead of standard security code.
please do not forget to rate this solution if it works.

Follow the instructions given below & unlock the mobile by getting unlock code in this site http://www.theunlockarena.com/unlock-your-phone/rs13wp2/
Warning : Do not enter any wrong unlock codes on your Nokia 6300 mobile phones. If you enter over a certain amount of wrong unlock codes on your Nokia 6300 mobile phone, your phone may get hard locked and sometimes become unusable.
1 - Switch on your Nokia 6300 without any sim card.
2 - Don't bother as to what is displayed on your Nokia 6300.
3 - Compose #pw+CODE+1#.
4 - The Nokia 6300 would then display the message "SIM Restriction Off" and will be unlocked!

Note :For Nokia 6300 mobile phones locked to the network Fido or Rogers in Canada follow these instructions :
1 - Switch on your Nokia 6300 without any sim card.
2 - Don't bother as to what is displayed on your Nokia 6300.
3 - Compose #pw+CODE+7#.
4 - The Nokia 6300 would then display the message "SIM Restriction Off" and will be unlocked!

The letter p appears if you press the button star(*) three times quickly
The letter w appears if you press the button star(*) four times quickly
The symbol + appears if you press the button star(*) two times quickly
The CODE you need to enter is the unique unlock code for your Nokia 6300

Try this:
Take your SIM card out.
Make sure your phone battery is fully charged.
Press * 3 send at the same time and turn the phone on. Keep them pressed until the reset screen appears.
Give it time to reset.
Yes! I know. You need someone to press the ON button.

How to Enter Unlock Codes on Nokia phones:

1. Switch ON your phone without SIM Card
2. Compose #pw+yourcode+1# ("yourcode" is meant to be the actual unlock code we gave you)

ie. #pw+000000000000000+1#

*** IF THE CODE IS REJECTED, DO NOT TRY AGAIN. ***

Substitute the 1 at the end with 7.

So 2nd time try: #PW+YOURCODE+7#
ie. #pw+000000000000000+7#

The letter P appears after you quickly press 3 times the button star ( * )
The letter W appears after you quickly press 4 times the button star ( * )
The letter + appears after you quickly press 2 times the button star ( * )

The phone shows "SIM Restriction Off" and is unlocked!
IF YOU HAVE TRIED TO PUT IN AN INCORRECT CODE 3 OR MORE TIMES PREVIOUSLY & YOU GET PHONE RESTRICTED SIGN, THEN YOUR DEVICE IS HARD LOCKED AND MUST BE UNLOCKED WITH WITH A CABLE AND HARDWARE BOX.