Forgot ..gmail acccount info..need to unlock the phone

Is this after forgetting the screen pattern? If you cannot remember the username and password to your G1, there is not a way to recover it at this time. The only way for you to have your phone again is to do a master reset using the hardware buttons. This will delete all of your data on the phone only (SIM card and memory card data will be fine). To do a master reset power the phone off completely. Hold the home key and the power key at the same time while turning it on again. You will see the T-Mobile G1 screen first, but them you will see a screen with a triangle appear. You can let go of the keys and open the keyboard. Press and hold the left ALT key and then press the letter W. Release both the keys and the phone will power off. Then it will power on again and act like you just removed it from the box. Create your new account and write down the username and password this time that way you wont forget it.