We have included all the steps in this post to unlock bootloader on BLU S91. Simply, follow this guide and you will end up unlocking the bootloader successfully.
If you get bored with the stock firmware of your smartphone and want to play around with more customization, then you will need to get your device rooted. But you can’t be able to root your device before unlocking the bootloader.
What is Bootloader?
In simple words, a bootloader is a set of instructions that are executed automatically, whenever the device is turned ON. The operating system and Kernel need bootloader instructions to start the boot process and operate the recovery mode.
By default, the bootloader of every smartphone is locked. The reason behind it is very obvious as every manufacturer wants the users to stay with their default provided skin and stock ROMs.
But as we know, Android is open-source and that gives more power and benefits to users to customize their smartphones with endless possibilities. Therefore, Android also provides users an alternate route to get a chance to customize their smartphones.
This process requires many hurdles ahead. It starts with unlocking the bootloader and so on the process continues with rooting and at last you can end up flashing the custom ROM on your device.
So, we get to know that unlocking bootloader is the permission for users to make different levels of customization from their end.
- Gaining the root access
- Allows to flash custom recovery
- Installing different custom ROMs
- This process may void the phone warranty
- The performance of your phone might also get affected
- The process might brick your phone, if anything goes wrong
- Might become a reason for disturbing the security of your smartphone
- You might also lose the data available on your phone storage.
How To Unlock Bootloader on BLU S91?
Pre-Requisites
- You need to charge your smartphone to at least 70% or above.
- Grab the original USB cable of your smartphone.
- Make a complete back-up of your important data. Note: It will wipe all the data available on your phone storage.
- Download BLU S91 USB Drivers.
- Download ADB and Fastboot tool. Windows and MacOS
Step 1: Enable The Developer Option and OEM Unlock
To enter the process of unlocking, you are required to enable the developer option first and then USB Debugging and OEM unlock.
- Go to settings on your phone.
- Locate the About Phone and then tap on Build Number several times until the Developer option gets enabled.
- Get back to the main Settings->General and then tap on Developer Option.
- In the Developer option, enable OEM Unlocking.
- After that, enable USB Debugging.
Step 2: Unlocking Bootloader on BLU S91
- Download and install BLU S91 USB drivers from the above pre-requisites section.
- Grab the original cable of your smartphone and then connect it to your PC.
- Turn your phone OFF Completely.
- Now, extract the ADB & Fastboot folder and right click anywhere in the blank space while holding the shift key to open the command windows or power shell windows.
Proceed with typing the following command to check whether your smartphone is detected by the computer successfully:
adb devices
Now, type the following command to enter into bootloader mode:
adb reboot bootloader
To unlock the bootloader, type in the following command and press enter:
fastboot flashing unlock
If the above command does'not execute successfully, then you can try the following command
fastboot OEM unlock
- After that, you will get the confirmation message, just proceed with Yes to unlock the bootloader.
- At last, reboot your smartphone by typing the following command to let your smartphone enter into unlocked bootloader state.
fastboot reboot
That's it, you have successfully unlocked bootloader on BLU S91.
BLU S91 Specifications
BLU S91 comes with 6.5 inches IPS LCD touchscreen display, providing a resolution of 720 x 1600 pixels.
Moreover, the phone runs on Android 11 powered by an Octa-Core processor.
The internal memory of the phone includes 128 GB paired with 4 GB of RAM and also supports a micro-SD card.
The camera features a triple 13MP + 0.3MP + 0.3MP primary lens with LED flash including other features. In addition, a 13MP secondary lens for selfies is available in front.
It is powered by Li-Po 5000 mAh battery. Officially available in Black, and Green colors.
The price of BLU S91 starts from 170 EUR.
How To Boot BLU S91 Into Fastboot Mode?
- Turn your Phone Off Completely.
- Now, press and hold Volume Up, Volume Down, and Power buttons simultaneously.
- When the new window appears on the screen, simply release all the buttons.
- Meanwhile, press the Volume Down button.
Now Your BLU S91 is in Fastboot Mode!
How To Boot BLU S91 Into Recovery Mode?
- Turn your Phone Off Completely by pressing the power button for a while.
- Once It was turned OFF. Now, press and hold the Volume Up, Volume Down, and Power buttons simultaneously.
- When the new Windows appear on the screen, release all the buttons.
- Next, press the Volume Up button to select the Recovery Mode.
- After that, tap on the Power button to display the Recovery Mode Menu.
Now Your BLU S91 is in Recovery Mode!
- Use the below buttons in recovery mode:
- Volume Buttons: To navigate between different options.
- Menu Button: To select the option.
I am a tech lover and smartphone enthusiast. I am always keen to know new things about smartphone software’s and hardware’s, So that I can provide solutions to user’s facing different problems.