Welcome to our community! Here you can share advice and tips with thousands of other Microsoft mobile devices users around the world in English. Please take a moment to read our community guidelines for more information. Everyone can search and read the discussions, but to post your own question or reply to others you need to sign in first. If this is your first time here, you can choose an alias to represent you. If you don't have an account yet, please register here.
I never reset my phone security number. Actually I never use it. but recently I have changed my number and got a new SIM. I inserted and restart the phone. On start it asked for security code, which i don't know. I have google it, and found that the default security code is 12345. I provided the same but says it wrong security code. anybody can help to know the security code, because of this I am unable to use my phone with new SIM.