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Fastboot

Fastboot | The Complete Guide to Flashing Factory Images on Android 2021

If your phone’s bootloader has been unlocked, you may use Fastboot commands to flash factory images onto the device. Suppose you boil it down to its essence. In that case, this is the most effective technique for upgrading a rooted device, repairing a bricked phone, returning a phone to its original state, or even receiving new Android upgrades before the rest of the world.

The Fastboot Android tool, which functions similarly to ADB, is a powerful Android utility receiving instructions over a terminal shell. But don’t be concerned if this seems scary; after you’ve gotten your bearings, you’ll know a great deal more about the inner workings of Android, as well as how to resolve the majority of frequent issues.

Samsung devices:

In addition to the majority of Nexus, Pixel, HTC, and Motorola devices and phones and tablets from a wide range of other manufacturers, the procedure explained below will work for them all. When it comes to Samsung devices, though, Fastboot isn’t the best option since the company’s firmware-flashing software is used instead.

Step 1- On Your Computer, Install ADB and Fastboot:

To flash images using Fastboot commands, you’ll need first to install ADB and Fastboot on your computer. These are the programmes that allow you to flash images using Fastboot instructions. In addition to the official utilities, some third-party “one-click” and “light” versions of ADB and Fastboot are available. However, I would not recommend using these because they are not updated nearly as frequently as the official utilities, and therefore may not be fully compatible with newer devices.

Instead, Google recommends that you download and install either the Android SDK Tools, including ADB and Fastboot, or only ADB and Fastboot from their website. Whether you get the whole bundle or simply the platform-tools individually, they are the actual thing. In the following instruction, Method 1, I’ve explained the installation procedure for Windows, Mac, and Linux. Click here to get started.

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Step 2- Activate OEM Unlocking:

Your device’s bootloader must be unlocked before you can use Fastboot to flash images. Step 3 may be skipped if you’ve previously completed this step.

However, if your smartphone came pre-installed with Android Marshmallow or above, you’ll need to activate an option before you can unlock the bootloader. Start by activating the Developer settings menu on your phone or tablet to go to this setting. Finally, enter the Developer settings menu, choose “OEM unlocking” from the drop-down menu, and you’re all set!

That means your smartphone may not have come preloaded with Android Marshmallow or a later version of Android. The option may be greyed out because your bootloader can’t be unlocked, which prevents you from utilising Fastboot to flash images.

Step 3- Get into the Bootloader Mode on Your Phone:

The phone or tablet must be in bootloader mode to perform any Fastboot instructions. There is no one-size-fits-all approach to this procedure.

Start by shutting off your phone altogether. Hold down the volume down and power buttons simultaneously for roughly 10 seconds until the screen turns black.

Suppose it doesn’t work; press and hold the volume down button while turning the phone off. Plug a USB data card into your PC, and then wait a few moments.

The USB cable technique may still not work if you use the volume up button instead.

Make sure your USB data cable is hooked into your computer when you see this message. The remainder of the work will be done on the computer side, so leave the device alone.

Step 4- Make use of the ADB Shell on Your PC:

Go to the location where you installed ADB and Fastboot on your computer. C:/Program Files (x86)/Android/android-SDK/platform-tools is a common location for Windows users. The location of your platform-tools folder relies on where you extracted the ADB folder when you installed the programme, so if you’ve forgotten, you may search your hard drive.

Hold down the shift key using a Windows PC while right-clicking an empty area and selecting “Open command window here” from the menu. The platform-tools folder in your ADB installation directory may be accessed by opening a Terminal session and changing directories to platform-tools.

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Step 5- Remove the Bootloader’s Password:

If you’ve already unlocked your bootloader, you may skip this step and go on to the next one. A single Fastboot command is required, but keep in mind that this will delete all of your device’s data.

It is important to remember that the commands shown here are for Windows users. Mac users will need a period and a slash (./) to use these commands, whereas Linux users will need an incision (/).

In the ADB shell, type the following command, then press Enter.

Step 6- The Factory Images may be downloaded:

Flashing factory images is now possible after unlocking your bootloader, but first, you’ll need to get the files themselves. Here are some sites to obtain the factory images for the most popular devices.

  • For Nexus and Pixel smartphones, factory images
  • HTC gadget factory pictures
  • Motorola’s factory pictures
  • Images of OnePlus products
  • Pre-installed software for Essentials devices
  • Each of the URLs above has a list of device models, and you can then download the most recent firmware for your device. Googling “factory pictures for phone name>” may help if your manufacturer isn’t mentioned here.

Step 7- Make use of the factory images:

Flashing the pictures is the next step. The first step is to extract the factory pictures archive you got from your manufacturer’s website. Because it’s free and compatible with the vast majority of archive formats, 7-Zip is a good choice for this step.

Open an ADB Shell window in the platform-tools folder within your ADB installation directory when you’ve finished. There’s a lot more detail about this in Step 4.

The photos may be flashed in various ways, and you can choose between two of them. In the following parts, I’ll go through both of them.

Option 1: Using the Flash-All Script

A “flash-all” script is included in most factory image packages to apply all images at once. You may use this method if you’re attempting to get your phone back from a soft brick. Option 2 is a better option if you’d prefer to avoid unrooting and erase all of your data.

Option 2:  Extract the Images and Flash Them One-by-One

Flashing the system images one at a time is another method. However, this approach requires more effort to unroot, upgrade, or unbrick a device without erasing its current data.

The first step is to extract any other archives from the factory images. Make careful to unzip all three or four nested archives in factory image packages since they may be found in some instances. Ensure that all image files are copied to the main platform-tools folder—don’t leave them in any sub-folders.

It is possible to remove the cache. img and user data. IMG from this location. If you don’t flash these photos, your data and stock will be overwritten with blank space. Therefore your existing data will be safe. Six of the remaining pictures make up the fundamental Android components: boot, bootloader, radio, recovery, system, and vendor.

To get rid of a custom kernel that’s creating problems with your device, all you need to do is flash the boot image. Enter the following command into your ADB shell window to begin.

  • fastboot flashes the boot image file name>.img:

Next, you’ll see the bootloader image, which is the interface you’ll use to flash images using Fastboot instructions. As a result, to do a bootloader upgrade.

  • Flash the bootloader.img file using fastboot:

Next, you’ll see the bootloader image, which is the interface you’ll use to flash images using Fastboot instructions. As a result, to do a bootloader upgrade.

  • reboot-bootloader with fast boot:

To continue flashing images on the newest version, you need to restart the bootloader. Do so by typing.

  • The radio image filename is radio file name>.img:

Finally, the radio picture is shown for issues with Wi-Fi or mobile data or to update your radio. Type: If you’re experiencing issues with connection on your smartphone.

  • Flash recovery.img file using fastboot:

Here we go: The system pictured is the huge one. All of the files that make up the Android operating system may be found here. It is the most critical aspect of each new release.

However, you may not be updating your phone. Re-flashing the stock firmware may be all that is required for a soft brick. As a result, if this is the case, flashing the system image is generally necessary to remedy the problem. Root access modifications will be reversed if you flash this image and nothing else, putting everything back to the way it was.

  • System. img can be flashed using fastboot:

Finally, there’s the photograph of the dealer. Don’t panic if you don’t see this in your factory pictures. It’s only seen on newer phones. There are several essential files on this disc that need to be changed. Therefore enter the following command:

  • flash vendor. img using fastboot:

Finally, after sending any or all of the instructions above, your smartphone will restart and boot into Android. Do so by typing:

  • Fastboot Reboot:

At this point, your device should be up to date, or if you were attempting to recover from a soft-brick, it should be working just well. Since you now know what each of the main system images performs, you will better understand how Android operates in the future.

Individually flashing factory images has helped me learn more about Android than any other tweak or procedure. Now that you’ve dealt with each image separately, you should be able to detect and handle root-related problems much more quickly.

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