It depends what phone you have, one way would be to do a HARD RESET of the device. By doing this it will restore your phone to the default settings and you can resetup Gmail... If you hard reset your phone all your information will be lost so make sure this is what you want to do. Google how to hard reset your specific device and there will most likely be a YouTube video showing you how.
reset phone lock
phone lock
You can reset the phone if it is an android. Moreover there is an option of forget password. It can reset your password if you want to.
You cannot unlock a phone using Gmail. Gmail is only connected if you login the lock application using it. It can help if you forgot your code.
Lost my phone lock code. Is there a master reset #?
To reset the phone lock on the Samsung Galaxy s2 go to the settings section and select password options. then select password reset and enter your current password followed the password you would like to change it to.
s5200 samsung mobile lock
One way to reset the phone lock password is to do a hard reset, which will erase everything on the phone. To do a hard reset enter *2767*3855#.
The phone lock on the Samsung GT-S3350 can be reset by opening the phone and going to options and then security. Set phone security will prompt one to enter a new code twice. Once this is done successfully, the new code is in place.
reset pw for gmail
maybe 0000 will reset it
i go to settings under security setttings then click phone lock enable