I can't open up my g1 android phone. how could i access the lock. it says that i need to sign in to google account. i do have an google account but when i sign in my account it doesn't open.

hiif you need to open your phone to other network you need to unlock your phone. you can unlock your phone using codes. you can get the codes from your service providers to whom your phone is currently locked or you can get the codes from other online providers like Prounlocking.com

open the pone and show the google account and enter sim show the network pin

Adding a Google account to your phone is optional, but highly recommended, and necessary in order to access the Android Marketplace. If you have a Gmail account, use your sign-in for this, otherwise sign up for a Google account at https://www.google.com/accounts/NewAccount

You will need to reset the device.

1. Power off the G1
2. Hold Home Key + End key for 20 seconds or until you see a "triangle with an exclamation point and a picture of the G1"
3. Open the QWERTY keyboard and hit Alt+W
4. Restored!

From http://www.androidcentral.com/factory-reset-tmobile-g1/

1) You'll need to borrow a SIM from a friend of yours to access the phone.

2) Open the market and install an application named "wosim".

3) Turn off your phone and then turn it on again.

this happend to me too, except it happend when i put the wrong lock patter in too many times. the reason it wont access ur google account is probably becuase u either dont have internet or no wifi where u are at. so go to a place where they have wifi and try there. or call tmobile tell them u forgot ur password and dot have internet and see if they can help

I want to run gprs into my Blackberry 8100.but the network is locked it is grameen phone network.How can I get this/

1. Turn the G1 off. If it’s frozen on, take the battery out and put it back in the unit.
2. Hold the Home and Power keys down at same time for about 25 seconds. You will see a yellow triangle screen with exclamation point in the middle.
Now to wipe the device clean:
3. Press Alt+L.
4. Press Alt+W for a factory reset.
5. Press the Home and Back keys again for about 25 seconds.
The device should then reset again and the hard reset is complete.

Attempt to enter the lock pattern 5 times.
Wait 30 seconds, then tap "forgot pattern?".
Enter your Gmail account name and password.
Sign in!

If you Unlock the phone for use with any sim card you will still have access to the android market regardless of the sim card you use