You can try resetting the password or pin through the Android Device Manager page. I have done this 5 or 6 times for myself and clients without erasing everything with a factory reset. It is worth a try before wiping out your device. Since Google's help page didn't have this I wrote it up here.
Add a Commentand also readhttp://smallbusiness.chron.com/reset-goo...Add a Commentand also read http://smallbusiness.chron.com/reset-google-ematic-tablet-68693.html
Answers & Comments
You can try resetting the password or pin through the Android Device Manager page.
I have done this 5 or 6 times for myself and clients without erasing everything with a factory reset.
It is worth a try before wiping out your device.
Since Google's help page didn't have this I wrote it up here.
Unlock Your Nexus Without Restoring
You don't say what model it is, but generally spaeaking you have to do a factory reset. Here is the procedure for a Nexus 7 for example
https://support.google.com/nexus/answer/4596836?rd=1
OK look at p32 herehttp://www.ematic.us/sites/default/files...
Add a Commentand also readhttp://smallbusiness.chron.com/reset-goo...