My volume has degraded , I can not re-biuld it. May i reset it to factory default ? How much time it may take? Does it help?

Resetting to Factory Defaults / Clearing the Memory

You can selectively clear information stored in your machine's memory.

1. Press Menu on the control panel until Maintenance appears on the top line of the display.
2. Press the scroll buttons until you see Clear Memory on the the bottom line and pressEnter.
The first available menu item, Paper Setting, displays on the bottom line.
3. Press the scroll buttons until you see the item you want to clear.
   • Paper Setting: Restore all of the Paper Setting options to the factory default.
   • Copy Setup: Restores all of the Copy Setup options to the factory default.
   • Fax Setup: Restores all of the Fax Setup options to the factory default.
   • Fax Feature: Cancels all of the scheduled fax jobs in the machine's memory.
   • Advanced Fax: Restores all of the Advanced Fax setting options to the factory default.
   • Sound/Volume: Resets the sound and volume settings to the factory default.
   • Machine Setup: Resets all of the system settings, such as the machine ID, date and time, display language and save modes, to the factory default.
   • Set Report: Clears all records of your faxes sent.
   • RCV Report: Clears all records of your faxes received.
   • Phone Book: Clears the speed dial or group dial numbers stored in the memory.
4. Press Enter. The selected memory is cleared and the display asks you to continue clearing the next item.
5. Repeat steps 2 and 3 to clear another item.
ORTo return to Standby Mode, press Stop/Clear.

http://www.support.xerox.com/support/enus.html

Doing a hard reset will erase all your saved files and application on your phone. It will restore your phone back to the default settings Hard reset procedure : 1. Make sure that your phone is off 2. Now you need to press the home button + volume down button + the power button at the same time 3. A recovery menu will appear 4. Choose wipe data/factory reset 5. You need to use your volume key to select and the power key to confirm the factory reset After doing a hard reset, you can now open your phone without a password.

To perform an External Manual Reset of your handset to restore to factory settings, read instructions below and then perform.

1. Power off the phone, press and hold volume down button, press power button.
2. Screen will come up with "Fastboot", press Vol down key to cycle through choices until you get"Android Recovery", then press Vol up key
3. Wait for the "triangle ! / Android" screen then go on to step 4
4. Tap on bottom right corner of the screen (may take a few times). a menu will come up
5. Tap on "wipe data/factory reset", and tap OK. Another Confirmation screen will come. Tap Yesand OK
6. After userdata is cleared, the "reboot system now" option will be highlighted by Default. Tap OK.
7. Phone will reboot to initial setup MOTOBLUR screen.

Tip: Once you've reset your device, you can use your existing account to sync your contacts back to the phone.
(Steps on Gingerbread 2.3)
Remove and remount the battery and power up
If the phone still does not boot up to the MOTOBLUR screen, then perform the following Factory Reset instructions:

1. Power off the phone, press and hold the Volume down button and Power buttonsimultaneously while powering up the unit.
2. Screen will come up with "Fastboot" at the top of the screen, press Volume down key to cycle through choices until you get "Android Recovery", then press Volume up key to boot in this mode
3. Wait for the "triangle ! / Android" screen then go on to step 4
4. Press both Volume up and Volume down key simultaneously. A Recovery Menu will come up
5. Tap on Volume down key until "wipe data/factory reset" is highlighted, and tap Power button. Another Confirmation screen will come. Tap on Volume down key until coming to Yes and tapPower button
6. After userdata is cleared, the "reboot system now" option will be highlighted by Default. TapPower button
7. Phone will reboot to initial setup MOTOBLUR screen.

To Perform a Factory Data Reset through settings menu:

1. From the Home screen, press Menu
2. Touch Settings
3. Touch Privacy
4. Touch Factory data reset (Read notes for other options)
5. Touch Reset Phone
6. Touch Erase Everything

To reset your phone to default factory settings:

• Press and hold the following button:
• Volume up + Power + Home
• This will bring up a small menu
• Using the volume keys navigate to "Wipe data/Factory reset"
• This option should restore your mobile to its default settings.

You find all you need in the drop menu.

just take your time and enter details in search engine lots of advice and plenty of helpful hints.

Try these steps:
ZTE Origin hard reset Master Clear/Reset Cricket Origin reset ZTE V768 ,

1. Make sure your phone has been powered off.
2. Hold down Volume up key and press Power key at same time until the screen lights up.
3. Press Home Key to access Android System Recovery screen.
4. Press Volume up\down key to locate wipe data/factory reset, then press Menu key to access factory data reset menu.
5. Select Yes-delete all user data, then press Menu key to confirm wiping data from the phone.
6. When finished, select reboot system now, then press Menu key to restart your phone.
Every data will be erased!

or You can reset your ZTE device's password: Turn off your phone, then turn it on. Select emergency dial. Input *983*987# in emergency dial-up pad. It will restore factory settings and your personal data will be erased.

or from the menu
Privacy: Reset to Factory Settings
1. Touch the Home Key > Apps icon > Settings > Privacy > Factory data reset > Reset phone.
2. Enter six zeros on the screen and touch Erase everything.
WARNING! All your personal information and downloaded applications on your phone will be erased after the factory reset. ZTE Origin V768 Phone Password A password can protect your phone and help prevent unauthorized use. When the phone is password protected, it will ask for the password every time the phone is turned on. Password protection is disabled by default, and the default password is 000000 (six zeros).

The reset worked for me, but I had to do in following order:
1. Turn off device
2. Hold down volume -
3. Hold down power at same time as volume -
4. Hold down volume + at same time as power and volume -

Doing this brought me to the Android screen where I chose to reset to factory defaults and also to clear cache, then chose to reboot.

- Max

There's no way to reset factory default but can access service menu, Hold down menu button on front panel and press volume up and power at the same time, on the top right screen, use volume up, Press to scroll to 72, press volume up and your are in the service menu.

If you do a hard reset it will go back to factory default settings.
With the device turned off, press and hold the VOLUME UP and VOLUME DOWN buttons, then briefly press the POWER button.Continue pressing the VOLUME UP and VOLUME DOWN buttons until you see this message on the screen:
Warning! Your device will be set back to factory default settings. Please ensure any additional installed programs and/or user data have been backed up before a hard reset is performed.Release the VOLUME UP and VOLUME DOWN buttons, press the VOLUME UP button to perform the hard reset, or press any other button to cancel the reset.

RTFM!!!
section 8, page 4

System -> Diagnostics -> Reset system
you will need serial number for this

good luck.