My smasung galaxy gt-s7500 is locked by too many attempts and asks to sign in with my google account to unlocke but i didn't know my account how can i unlocke my mobile

SOURCE: samsung galaxy android unlock..cannot unlock my

Hi, I have a couple of idea for you to try.
1) Log in to your google account on your pc, the same account you registered for your phone

2) After logging in look at the top right corner of your inbox/email page, it would say your google username. Like say if you name is John, and you have a google id thats registered to your galaxy s as , [email protected]. Now this google id on the top right corner of the page would be displayed as [email protected]

3) Type in the google id, thats visible on the right hand top corner of your page (like [email protected]) into your galaxy s handset locked page, and type in the password.

TADA AND YOUR ON TO THE NEW SCREEN TELLING YOU TO PUT IN ANOTHER PATTERN.
or theres this one:
Take out the battery, the sim card, and the SD card leave the phone for 2 to 3 hours like that.. Put everything back in and boot up the phone.. This should work.
You could try this instead of waiting 3 hours, just remove battery and press power on switch for 20 seconds but this may not work.
or if you've tried everything, the only other way would be to take it to a Samsung mobile phone shop.
or do a factory reset:
THIS WILL ERASE ALL YOUR DATA THOUGH
Go into recovery mode - vol up & home & power. Once in the menu, select factory reset.It may take you a couple of attempts to get to the recovery mode but it does work, just keep trying.

Regards
Mike

SOURCE: samsung galaxy s mobile completely

You can do a complete reset if you want and have no other option(this will erase all your data). To do this follow these steps.

• Turn off your your phone
• Now hold the Volume Down + Home + Power buttons (when you see the Samsung logo, stop holding it for half a second and then again hold it).

• Scroll to wipe data/factory reset using the volume buttons. to select it press the home button
  

  • When that is done go to reboot system and select it.

SOURCE: cellphone postpaid SIM PUK Locked,How to unlock

PUK stands for Personal Unblocking Key. This is a unique eight-digit code specific to your SIM card. This is required when the PIN number to unlock your mobile phone is entered incorrectly 3 times. You are then given 10 attempts to enter your PUK code. If an incorrect PUK code is entered after the 10th attempt, you will block your SIM card permanently and will require a new SIM card from your mobile phone provider.
PUK codes can be obtained through the following ways - The PUK code is in your SIM card documentation Starter Pack. If you do not have this then - Please contact your phone service provider.
Your cell phone service provider can give you the PUK code once you give them your account details and they have confirmed your identity. For details to obtain the PUK code for the SIM card, please click on this link and follow my instructions.
http://www.fixya.com/support/r5705889-puk_code

SOURCE: Unable to unlock my Samsung Galaxy GT S 5570

if it is says too many pattern attempt ,your phone need to reset ...do this tricks ,...
1. Power off phone
2. Press and hold Menu Button ( middle ) + power on for at least 10 seconds
3. Android System Recovery Mode Appear
4. There are 4 options

• reboot system now

• apply sdcard:update.zip

• wipe data/factory reset

• wipe cache partition
  

5. Move the options to " Wipe data / factory reset " using volume down ( - ) button and menu button to confirm, because the touchscreen doesn't work in reovery mode
6. After the process done, phone will reboot.

SOURCE: . I need help to unlock my samsung phone. I forgot the pattern and it`s asking me to sign in with my google account in my galaxy but I forget also.

Sounds too simple and maybe you have tried it but pull out the battery and see if that resets. I have a blackberry and it worked for me.