Android download screen oem lock

By default, most Android devices ship with a locked bootloader, meaning that users can't flash the bootloader or device partitions. If needed, you and device users with Developer options enabled can unlock the bootloader to flash new images.

To unlock the bootloader and enable partitions to be reflashed, run the fastboot flashing unlock command on the device. After setting, the unlock mode persists across reboots. After setting, this mode persists across reboots and factory data resets.

When the fastboot flashing unlock command is sent, the device should prompt users to warn them that they might encounter problems with unofficial images. After the user acknowledges the warning, the device should perform a factory data reset to prevent unauthorized data access.

The bootloader should reset the device even if it can't reformat it properly. Only after a reset can the persistent flag be set so that the device can be reflashed. All RAM not already overwritten should be reset during the fastboot flashing unlock process.

This measure prevents attacks that read leftover RAM contents from the previous boot. Similarly, unlocked devices should clear RAM at every boot unless this creates an unacceptable delay , but should leave the region used for the kernel's ramoops.

To lock the bootloader and reset the device, run the fastboot flashing lock command on the device. The ro. If the device supports flashing unlock, then the bootloader should indicate the lock status by setting the kernel command line variable androidboot.

This variable must be set in bootconfig instead of in the kernel command line in Android For devices that support dm-verity , use ro. Devices should support the locking and unlocking of critical sections, which are defined as whatever is needed to boot the device into the bootloader.

Such sections might include fuses, virtual partitions for a sensor hub, first-stage bootloader, and more. To lock critical sections, you must use a mechanism that prevents code kernel, recovery image, OTA code, etc. OTAs should fail to update critical sections if the device is in lock critical state. Transitioning from locked to unlocked state should require a physical interaction with the device. This interaction is similar to what the effects of running the fastboot flashing unlock command but requires the user to press a physical button on the device.

Devices shouldn't allow programmatically transitioning from lock critical to unlock critical without physical interaction, and devices shouldn't ship in the unlock critical state. Content and code samples on this page are subject to the licenses described in the Content License. Edit this Article. We use cookies to make wikiHow great. By using our site, you agree to our cookie policy. Cookie Settings.

Learn why people trust wikiHow. Download Article Explore this Article parts. Related Articles. Part 1. All rights reserved. This image may not be used by other entities without the express written consent of wikiHow, Inc. Open a web browser on your computer. You can use any web browser of your choice. This is the website where you can download Android SDK. This allows you to interface with your Android system on your computer.

Warning: Not every Android device has a lockable and unlockable bootloader. Many manufacturers and mobile carriers don't allow you to unlock or lock your bootloader. Warning: Locking your bootloader will most likely wipe your entire Android device. Make sure you backup your device before attempting to lock it or flash it. Click the download file for your operating system. Click the download link for whichever operating system your computer uses.

All three are listed below the "Downloads" header. Read the Terms and Conditions and click the checkbox at the bottom. The checkbox is at the bottom next to " I have read and agree with the above terms and conditions. Click the green download button. It's below the text and the checkbox. This downloads a zip file containing a folder called "platform-tools.

Unzip the contents of the zip file. Simply double-click the zip file and then drag and drop the "platform-tools" folder inside the zip file to a location that you can remember and easily access.

Download the drivers for your Android device. Depending on your device, you may have to install drivers to make your computer recognize your Android. You can get these drivers from your phone or tablet manufacturer's website. Part 2. Boot your phone into recovery mode. Select Recovery mode and press the Power button. Connect your Android to the computer with a USB cable. Open the Terminal or the Command Prompt as an administrator.

If you are using a Mac or Linux computer, you will need to use the Terminal. By following this simple drill, you can learn how to disable the lock screen on Android. Now, you can safely remove your device and use it the way you like.

All the Android devices are linked to a Google Account. Therefore, you can take its assistance to disable the lock screen on Android as well. The only condition is that your device should be running on Android 4. This is because Android got rid of this feature in the newer versions. If you know the linked Google account credentials, then follow these steps to learn how to disable lock screen on Android.

As you can see, to implement this, you should know the linked Google account credentials and that your phone should be running on Android 4. If you are familiar with Android SDK, then you can easily follow this approach.

It is a bit of technical solution, and you should know the command prompt basics. Also, the USB debugging option on your phone should be turned on in advance. By entering the relevant ADB Android Debug Bridge commands, you can remove the existing pattern or password on your phone.

To learn how to remove the screen lock pin on Android, follow this simple drill. If everything goes according to the plan, then your device will be restarted without any lock screen. Lastly, you can learn how to disable Android's lock screen by restoring it to factory settings. Since it will erase the saved data and settings on your phone, it should be considered as a last resort.

We will first boot the device in the recovery mode and later wipe its data. In the end, your phone would be restarted, and it can easily be unlocked without any password or pin. I'm sure that after following this guide, you would be able to disable the lock screen on Android easily. From all these solutions, dr. Keep the tool handy and use it during any unwanted situation to unlock your phone.

Free Download. Android Unlock 1.