Hard reset Lumia 800 and 900

While it is very rare for any Windows Phone to crash or freeze, we have on a few occasions seen it happen. It's rare because 3rd party apps don't have access to the core of the OS and therefore it's very difficult to cause the system to become unstable. Still, the problem may pop up and we figured we would cover you for the Lumia 800 & 900.
Why these two Nokia devices? With their unibody design, there's no physical way to access and therefore pull the battery. That puts users in a pickle if they need to soft-reset a stuck device. So without further ado, here's how you do it:
Lumia 900

• Press and hold the volume keys, power button and camera together for 3-5 seconds
• The phone should soft-reset (although some say you should feel 3 vibrations, ours never has)

Lumia 800

• Press and hold the volume keys and power button together for 3-5 seconds
• The phone should soft-reset

That's it. So although you will probably never need this it's good to know if you're in a pinch.
Edit: Some are saying in comments that just holding the power button for 10 seconds works too.

BlackBerry® Hard Reset

The BlackBerry® is one of the top-selling smartphones. It allows you to do everything from talking to texting to taking pictures. The phone also features web-browsing capabilities that allow you to check the latest news or sports while on the go. Sometimes, the smartphone or some of its features may malfunction because of wireless or technical problems. If troubleshooting the problem does not work, then you may need to reset a BlackBerry®. The smartphone may require either a soft or a hard reset, depending on the issue.

BlackBerry® Hard Reset

Keep your BlackBerry® powered on.
Open the battery cover on the back of the BlackBerry®. You need to remove the battery.
Wait for up to 30 seconds and then reinsert the battery into the back of the phone.
Close the battery cover. The BlackBerry® should reboot and function normally.

BlackBerry® Soft Reset

Restart the BlackBerry® by trying the soft reset method. You need to leave the phone turned on for this reset method. This technique requires you to use keys on the phone rather than remove the battery.
Hold down the "Alt" key and then press and hold the right "Shift" key. You need to press both buttons at the same time.
Press the "Backspace/Delete" key while continuing to press down the "Alt" and right "Shift" keys.
Wait for the BlackBerry® to reset. When this happens, you will see the screen turn off. It may take a few minutes or more for the smartphone to return to its normal settings.
Release the keys when the display on the BlackBerry® screen turns off.

Tips

* Some reset instructions may only apply to specific BlackBerry® smartphone models, so it is always best to check the user manual. You can also check with your service provider to learn how to troubleshoot any phone issues. In addition, some manufacturers and wireless service providers may perform a master reset, master clear or a factory reset. This process erases non-BlackBerry®-related data and settings and restores the phone to its original factory settings.
* Performing a BlackBerry® hard or soft reset does not delete any of your saved data or settings. Only a master reset wipes away everything from the phone's memory, except for the factory settings.
* Not all BlackBerry® smartphones display the "Alt," right "Shift" and "Backspace/Delete" keys in the same way on the QWERTY keyboard. However, the location of the keys is the same. Refer to your phone's user manual to verify the keys.

Warnings

* Do not attempt the soft reset method if you have a model such as the BlackBerry® Pearl or the BlackBerry® Storm. These phones do not feature a QWERTY keyboard, but they include SureType® technology or a SurePress® touch screen. Follow the appropriate guidelines for setting these phones by consulting the user manual or by contacting your service provider.

Hard reset LG ego T530

enter this code 3845#*530#
select factory reset 

hard reset of the Samsung Galaxy W i8150

Hard reset of the Samsung Galaxy W i8150

Learn how you could perform a hard reset of the Samsung Galaxy W i8150.
Don't get too frustrated if your device is not working as expected, you could always reset it back to the manufacturer settings. Just try to remember what you did you that cause the problem so that the next time you won't get that problem again.
Before performing the reset though, you should back up all your important data such as contacts, music, photo and other personal data.
Dial a Reset - this is the simplest way.
1. On the dial pad put in *2767*3855#.



1 trun off your phone. Boot into recovery mode by pressing HOME KEY+POWER KEY+VOLUME UP KEY,@Samsung logo appears,release power key. keep holding home key+power key until android guy. Release all buttons and press the "option" button . the screen will grey out and wait until the recovery menu will come out.

2. Then select Wipe data/factory reset.
3. Now select Yes to proceed.
4. Wait for the Samsung Galaxy Ace to finish the process, and after it finishes, select Reboot now.
5. Now wait for the phone to start up.

Hard Reset For New Samsung GT-I8000 omnia II

Hard Reset For New Samsung GT-I8000  Omnia II

1. First switch off your phone
2. Next hold Volumn Up + Screen Lock
3. Then hold Green and Power Button together
4. Then press Answer Call (left) button to confirm hard reset

Hard reset I727

How to do a hard reset on the Samsung Galaxy S 2 Skyrocket I727

Power off phone. Pull battery (not necessary but wth)

Put battery in
hold volume up and down at same time while pressing power button.

When phone vibrates release power button.

There should be an option in the recovery menu.

My understanding of a soft reset is simply power cycling the phone.

You can also hard reset in the phones menu

Menu.settings.privacy.factory reset

Samsung I717 Galaxy Note Hard reset

Samsung I717 Galaxy Note

Pull battery , put back in. and hold POWER+ Vol Up and down at same time