I have n-70 cell phone .i have entered lock code but since my brother has changed the code and he has forgot the code . whenever i switch on the phone it shows sim card registration failed .i have tried different sim card but it is still showing the same error kindly tell how to do .
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Enter the default code of your cell phone and press the "OK" option. Most default codes will be "1234," "0000," the last four digits of your cell phone number, or Social Security number.
Press the pound key on your cell phone's keypad. Enter a six-digit security code. The code is most likely "000000."
Call your cell phone provider and ask them to reset your pass code. This will either reset your password to the default pass code or will disable the pass code option all together. Disabling the pass code will allow you to choose a new code.
just click on this site www.unlockme.co.uk/master.php
after clicking on this site you have to enter your imei no. in the textbox which is given on that page and after entering your imei click on get master code button to get your master code
after getting your master code enter it on your phone as lock code and change it
If you need the SIM Pin number to switch the phone on, then you have to enter any Pin number 4/5 times, then the phone will request a PUK number. This number was on the plastic card that your SIM card was attached to. If you don't have it, only your Network Service Provider can supply it to you.
If it's the Security code you need, to get into certain settings IE. erasing received calls, missed calls, timers etc... the Nokia default is 12345 if you didn't change it, but if you did change it and you've forgotten it, let me know, I'll tell you how to retrieve it.
did u change the security code as well? if not then all u need to do is press the menu button when the cell ask u for the lock code and it will ask for security code, enter 000000 (6 zeros)... that shud work if u only changed the lock code.