[Xperia Z3v General] 1linuxfreak:
Power the Device Up in Safe Mode - Sony Xperia® Z3v

[Device-Specific Instructions]

Safe Mode puts your phone in a diagnostic state (returned to default settings) so you can determine if a third-party app is causing your device to freeze/reset / run slow. Our Troubleshooting Assistant can help you with other device issues if you aren't currently using the tool.

An alternate method is available if the device can be powered on and is responsive.

With the device powered off, simultaneously press and hold the Power button and the Volume down button (located on the right edge of the device ) until the Sony screen appears then release.

From the System Recovery screen, select Safe mode.

Note Utilize the Volume buttons to navigate and the Power button to select.

Note Allow approximately 1 minute for the device to reboot.

Note Once rebooted, 'Safe mode' appears in the lower-left corner of the screen.

Note Notes:

With Safe Mode enabled, test device and app functionality. If the previous issue fails to occur, the cause has been isolated to a third-party app and all recently installed or updated apps should be uninstalled.

Power cycle device to disable Safe Mode then reinstall and test each app one at a time to identify which app is causing the problem

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Clearing an Application's Cache / Data:

NOTE: Assuming that one of your applications isn't working properly then you may be able to fix this by clearing the app's cache or data. WARNING! Clearing an application's data will result in the removal of all personal information stored within the app. This includes login and credit card information, profiles, saved games, settings, high scores etc. It's recommended that you first try clearing the cache in order to prevent unwanted file deletion.

Tap "Apps" while viewing the home screen

Access the "Settings" menu and scroll to "Device"

Tap "Apps" and access the "All" or "Downloaded" screens

Select the desired application and tap "Clear cache"

If the method above didn’t help, tap "Clear data" too and press "OK" to confirm

Clearing the Phone's Cache Partition:

NOTE: In case your smartphone is not working as intended, it crashes, freezes etc. then you may consider master resetting it. However, you can also try solving these problems without losing personal data caused by a factory reset. To do so, try clearing the phone's cache partition as explained below:

With your smartphone turned on, press and hold the "Power" and "Volume Up" buttons

Wait for the screen to turn off and for the smartphone to vibrate three times

Once that's done, release all buttons

The cache partition should now be wiped. Press the "Power" key to turn on the smartphone as you normally would

NOTE: If clearing the phone's cache partition hasn't solved the problem, then you might want to master reset your phone. To learn how you can master reset the Sony Xperia Z3V, click the link

Enter Safe Mode and Uninstall an App:

NOTE: If you've installed an application that causes issues on your phone and prevents you from removing it as it runs processes in the background, then you can easily dispose of the app by first rebooting your phone in safe mode. In this mode, all third party applications are disabled.

With your smartphone turned on, press and hold the "Power" button

Tap and hold the "Power off" option

At the Safe Mode prompt, tap "OK" and wait for your smartphone to reboot

Once your phone restarts, a "Safe Mode" message should be present in the lower-left corner of the screen

To remove an app, tap "Apps" while viewing the home screen

Go to "Settings"

Swipe to "Device" and tap "Apps"

Scroll to the "Downloaded" screen and select the application you wish to remove

Tap "Uninstall" and press "OK" to confirm

Read more: http://verizonforums.com/threads/so...che-reboot-in-safe-mode.363259/#ixzz3PUePFP00