Samsung Galaxy S4 hard reset

force reset Reset the device: Press and hold for more than 7 seconds to reset the device if it has fatal errors or hang-ups, or freezes.
sgs4 hard reset  or reset Galaxy S4: PRESS AND HOLD VOLUME UP + Home Button + Power. Keep holding HOME + Volume UP, but after vibrate release power.

Unlock Galaxy S4 using hard reset

Turn the phone off.
Press and hold VOLUME UP and Home (middle) button
Press Power until the phone vibrate
Wait until you see the Android logo then release all the buttons.
Select Wipe data/Factory reset with VOLUME DOWN, press Power (right hand-side)
Select YES -- delete all user data with VOLUME DOWN and then press Power
After format, press Power again to reboot phone. (select reboot system now)
unlock i9500 galaxy samsung cell phone red triangle exclamation mark
or
If your device is frozen and unresponsive, press and hold  for 7 seconds. The device will reboot automatically.
If this does not solve the problem, perform a factory data reset. In Idle mode, open the application list and select
Settings  - Accounts  -  Back up and reset→ Factory data reset → Reset device→ Erase everything.
or Factory format entering sgs4 format code
Use this method to hard reset your Samsung Galaxy S 4: Enter *2767*3855#. Warning! All your data including contacts, messages etc. will be lost! Copy all your necessary data/Contacts/Messages etc. to SIM or make backup to your PC before full reset! Take out SIM card before full reset.
Note: If you reset your device to the factory defaults with SD card encryption setting enabled, the device will not be able to read your encrypted files. Disable this setting before resetting the device.
sgs4 firmware flash download mode: PRESS AND HOLD VOLUME down + Home Button + Power on
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Samsung Rex 90 S5292 hard reset

Use this method to hard reset your Samsung Rex 90 S5292 dual SIM phone: Enter *2767*3855#. Warning! All your data including contacts, messages etc. will be lost! Copy all your necessary data/Contacts/Messages etc. to SIM or make backup to your PC before full reset! Take out SIM card before full reset.
Your default security phone lock code preset 00000000 / eight zeros

Samsung Galaxy Y Plus S5303 hard reset

Reset Galaxy Young: Charge your phone fully.
OR Press Volume UP + MIDDLE HOME key + POWER on.
(or Press Volume UP + MENU + POWER on.)
Select wipe data / Factory reset and confirm. All data will be lost!

If your device has fatal errors or hang-ups, or freezes, you may need to reset the device to regain functionality.
Reset the device: press and hold POWER/Lock button for 8-10 seconds, then release it.
Settings > Location and security > Clear storage: Erase the credential contents from the device and reset the password.

Samsung Galaxy Y Plus S5303 hard reset Vodafone Galaxy Y Plus

Your device freezes or has fatal errors

Perform a factory data reset. In Idle mode, open the application list and select:
If your device is frozen and unresponsive, press and hold for 8-10 seconds. The device will reboot automatically.
If this does not solve the problem, perform a factory data reset. In Idle mode, open the application list and select
Settings > Back up and reset > Factory data reset > Reset device > Delete all.
Reset your settings to the factory default values and delete all your data.
or
Use this method to hard reset your Samsung Galaxy Y Plus GT-S5303: Enter *2767*3855#. Warning! All your data including contacts, messages etc. will be lost! Copy all your necessary data/Contacts/Messages etc. to SIM or make backup to your PC before full reset! Take out SIM card before full reset.
When disposing of your device, back up all data and then reset your device to prevent misuse of your personal information.

Samsung Galaxy Fame S6810 soft reset

Press and hold for 8-10 seconds to reset the device if it has fatal errors or hang-ups, or freezes.
or
To soft reset your Samsung Galaxy Fame GT-S6810 android phone simply take out the battery and reinsert it.
Menu settings
Factory data reset: Reset settings to the factory default values and delete all data.
Your Samsung Galaxy Fame freezes or has fatal errors
If your device freezes or hangs, you may need to close programs or reset the device to regain
functionality. If your device is frozen and unresponsive, press and hold the Power button for
8-10 seconds. The device reboots automatically.
If this does not solve the problem, perform a factory data reset. On the Applications
screen, tap Settings  -  Backup and reset - Factory data reset - Reset device - Erase everything.

Samsung Galaxy Mega i9205 Soft reset

Press and hold for more than 7 seconds to reset the device if it has fatal errors or hang-ups, or freezes.

Your device freezes or has fatal errors
If your device freezes or hangs, you may need to close programs or reset the device to regain
functionality. If your device is frozen and unresponsive, press and hold the Power button for
more than 7 seconds. The device reboots automatically.

If this does not solve the problem, perform a factory data reset.
use menu option in settings
On the Applications screen,
tap Settings - Accounts - Backup and reset - Factory data reset - Reset device - Erase everything.

gt i9205 Factory data reset: Reset settings to the factory default values and delete all data.
Encrypt external SD card: Set the device to encrypt files on a memory card.
If you reset your device to the factory defaults with this setting enabled, the device will not be able to read your encrypted files. Disable this setting before resetting the
device.
or
Use this method to hard reset your Samsung Galaxy Mega GT-i9205 Android phone: Enter *2767*3855#. Warning! All your data including contacts, messages etc. will be lost! Copy all your necessary data/Contacts/Messages etc. to SIM or make backup to your PC before full reset! Take out SIM card before full reset.