My g1 keeps shutting on and off. i hold the power and home keys but still no results

You will need to reset your phone to it's factory defaults:

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

Let me know if that works for you. Thank You.

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/

If it keeps rebooting itself at the G1 and Android screen, you might want to factory reset the phone and clear all the data as there may be a virus. To do this, when turning on the phone, hold the home button and the power button even while the G1 screen comes up. Keep holding these until an image with a triangle comes up. You will then wait 5-10 seconds, and press the home and power button again together. This will bring up the OS screen, and provide you 4 options. One of these options is to wipe and restore to factory. Do this and your phone should work fine after you reboot again.

you probably need to do a hard reset, which will unfortunately, restore your phone to the factory defaults.

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. Just like new.
   

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 keyboard and hit Alt+W
4. Restored!

If your T-Mobile G1 Google smartphone is not responding or is frozen, you may have to opt for a hard reset. Here’s how:
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.

Have you tried a reset using the hardware buttons? To perform this, you need to turn off the phone first. While it is off, press and hold the home key and the power key at the same time. Keep holding the buttons until you see a screen with a triangle and an exclamation point in the middle. Once you see the triangle, let go of the buttons and open the keyboard. Press ALT+W at the same time, and the phone should reset.

Power off the G1

Hold Home Key + End key for 20 seconds or till you see a triangle with an exclamation point and a picture of the G1

Open the QWERTY keyboard and hit Alt+W

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.
Thanks, Joe


I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

do a hard reset.
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.

do a hard reset.
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.