How To Unlock Your Android Mobile Without Internet Connection When You Forget the Pattern

          The built-in pattern lock tool is useful for adding an extra layer of security to your Android Smartphone. What happen if you forgot your pattern and want to know how to unlock android phone or tablet? Pattern lock is very important for those who have sensitive data or have personal files in their android devices. This will help you to prevent your device from unauthorized use but the trouble starts when you forget it. This tutorial will show you how to unlock and reset your android device lock pattern if you have forgotten your lock pattern and can remember your Google/Gmail account. Here are several methods for ret reviewing the security options of your mobile. By using internet it’s easier to do and without internet also various steps are being there.

Unlock without internet connection:

   This is easy method to do

Steps to recover lock pattern of any android device phone

• Switch off the phone.
• Now hold this buttons all together at the same time “Volume up + Home Key + Power Button” until the phone boots (if you device doesn’t have a home button just hold together volume up key and power key)
• Now a screen like DOS will come up with different options
• Use the volume key to move up and down then scroll down to “Restore Factory Defaults” or “Delete all User Data” depending on which is on your device.
• After clicking on the settings above, now scroll down to “Reboot System Now” and wait for your phone to reboot.

 More than the above here are several ways even in this stage. I'll try to sum up as many of them as I remember/find. Also, I don't keep it restricted to a single device -- but try to cover as many as possible, so it will be helpful to as many readers as possible. As you kept the device-tag from your question, all of them should find it

All devices: if your credentials are not accepted, though they are correct
Sometimes this part seems to be buggy, so this page lists a few work-around. Amongst others, these include:

• Try entering null as password. 
• try entering your username without @gmail.com
• Combine 1 and 2
• Try the normal recover password routine from GMail.com and start over from 1.
• All devices: Bypass screen lock using a special app
• According to TheUnlockr, the problem should be very easy to resolve:
• Go to the web version of Google Play.
• Login with the Google account associated with your Android device.
• Install Screen Lock Bypass (unfortunately a paid app now).
• Reboot your device.
  

          Another source mentioning this is UltraTechy.Com, which contains a few more explanations. According to that, the app will circumvent the "too many attempts" block, so you can directly access your device again (to e.g. make a complete backup before resetting it). As soon as this app is uninstalled, the "too many attempts" will be in effect again immediately. 

 Hence, they add a few more steps:

• Go to Settings → Accounts & Sync
• Under Manage Accounts, remove all accounts except your Google account. (this should enable your Google username and password)
• Go to Settings → Applications → Manage Applications. Find Screen Lock Bypass and uninstall the app. (this will trigger the “too many pattern attempts” screen immediately)
• Use your original Google username and password to finally unlock your phone properly
• Enter your new security pattern twice to finish