G1: Well I cut my phone and the G1 logo appeared then ...

try xdadevelopers.com.plent info there

Hi,

You may need to wipe the factory setting. To do so, Turn Off the cellphone, now keep on holding the Home button and turn on the cellphone. It go to the recovery console, now select WIPE or press the short keys mentioned over there and restart cellphone.

Note: You will not loose any data but you may need to resign to google and also may need to install some application.

Thanks and regards,

Anil.B.R

Hi i have htc g1 mobile and i have a problem with the start-up when I tried to turn on the mobile the first logo was T.Mobile G1 and than it turned on to the second logo androd.after those two logo a blank screen came and near the battery it came warm and on the screen nothing happens.

Try getting into recovery mode. Hold down home and press power. Keep holding home down while the phone boots. Can you get into recovery mode? You can just pull the battery after testing this.

You can also try holding "menu" while booting. This should put you in "safe" mode. If this works, then use the settings menu to do a factory reset and reboot.

Make sure that you take the battery and SIM out immediately. Find some desiccant and put it in the desiccant overnight.
Here are some other tips:
http://yourmonstersofmobile.com/how_to_for_cell_phones/dropped_your_cell_phone_in_water_this_might_help.html

Press and hold Home key+ Power key, G1 will boot to restore mode. Wait until Android logo appears, open key board and press "left Alt+ W. There is an exclamation icon appears, wait for phone reboots again. After that, user can add new Gmail account.
Regard!

Check if you have placed the SIM card correclty and also check that the battery is fully loaded.

g1 keep cutting off when im using the phone and turns it on and it cut back off and after charge phone it work right for a minute and turn back off

Either the contacts to the battery aren't lining up correctly or it just needs a new battery. OR the charger isn't charging the battery.

The method of performing a hard-format, i.e resetting it completely to factory defaults and removing all data, is as follows:

1. Switch off the phone.
2. Hold down the following three buttons: Green (call answer) button, * button, and '3' button
3. While holding these buttons, press the power button and switch on the phone
4. When the message 'Formatting' appears on the screen, release all of the buttons

Note that you shouldn't switch the phone off or remove the battery when performing either of these operations, and it's advised that the handset has a reasonable amount of battery charge before performing a format/reset.