Sharp smartphone is well known in Japan and it is not the first time Sharp came out with a bezel-less smartphone. Sharp Aquos S2 is the first bezel-less smartphone that expands outside of Japan after the acquisition by Foxconn. Today we will guide you on How to Unlock Bootloader On Sharp Aquos S2 (ss2 / sat). There are two variants in Sharp AQUOS S2, SAT and SS2. Well, SS2 is a variant which comes with 4GB/64GB and SAT has 6GB/128GB. To flash or root and even install custom ROM you need to unlock the bootloader on your device.

Now you can unlock bootloader easily by following this simple guide. Official Bootloader Unlock for Sharp Aquos S2 (ss2 / sat) will also void the device warranty. So if you planning to Unlock Bootloader On Sharp Aquos S2, then it’s always better to wait until your warranty gets over. In case if you have unlocked the bootloader, then you can always relock the bootloader on your device anytime.

What is Unlock Bootloader?

A Bootloader is a code which runs when we turn on our device. This code initializes some hardware and then loads the kernel and ramdisk, and gets the boot process going. So this process is known as Bootloader. The same concept applies to all the technical stuff such as Laptop, PC, Smartphones and any such device. Every Android OEM manufacturers lock the bootloader even though it is an Open Source. So if you want to try any CUSTOM ROM, it is impossible to load the CUSTOM ROM without the Unlock Bootloader. So Manufacturer made a policy of making the smartphone with Unlocked Bootloader will void the warranty. They want you to stick with the Stock ROM. Unlock Bootloader allows you to Root your android smartphone, Flash TWRP and Custom ROM in a simple easy method.

Requirements:

  • To Unlock Bootloader On Sharp Aquos S2 (ss2 / sat), you need a laptop or PC.
  • There are two methods to unlock the bootloader on this device.
  • Charge the Sharp Aquos S2 to a sufficient battery level to avoid any sudden shutdowns during the process.
  • We strongly recommend you to take a complete full backup of your personal data, including the internal storage. The phone will be formatted, so be prepared for it. You can also follow our Android backup guide for the same.
  • You need a USB cable to connect your phone to PC.

Required Files on your PC:

Steps for How to Unlock Bootloader On Sharp Aquos S2 (ss2 / sat)

1st Method: Instructions via unlockcode.bin

  • First of all, enable the Developer Option
  • To Enable the Developer Option, Go to your Settings -> About -> Software Information -> More -> Now Tap on the Build Number 7-8 Times until you see a toast message “Developer option enabled“
  • Go back to settings -> Now you need to enable the OEM Unlock by going to Settings -> Developer Option and Enable OEM Unlock and USB Debugging
  • Download and Extract the Downloaded ADB fastboot Zip file on your PC.
  • Now connect your phone to Computer using USB Cable.
  • When you connect your Phone to Computer, please wait until all the drivers get installed.
  • In your ADB fastboot folder open a command prompt window by pressing Shift Key + Right Mouse Click
  • Now type the command in your command window
  • adb devices
  • If you see a pop up to allow USB Debugging on your phone, Click OK
  • Now type the command below to reboot your phone to bootloader
  • adb reboot bootloader
  • Once your phone reboot into bootloader, make sure your phone shows the bootloader locked and then type the command below to make sure fastboot drivers are installed properly.
  • fastboot devices
  • This command will list the connected devices. If your phones serial number shows up you are good to go and may continue. If the phone is NOT listed this indicates that your drivers are not installed correctly. In order for you to continue, you must fix your drivers so that your phone is listed under fastboot devices.
  • If the phone has been recognized by the command above, proceed to unlock the bootloader
  • Now copy unlockkey.bin to fastboot folder and type the following command
  • fastboot flash unlock unlockkey.bin
  • You should have a response “OK”.
  • Now use the fastboot-android.exe from SUT (OST portable folder). Now type command
  • fastboot-android flashing unlock_critical
  • If its ok – phone screen should give a message about Bootloader unlock.
  • Now finally type the following command
  • Remember that this step will wipe EVERYTHING off the phone
  • fastboot oem unlock-go
  • After the above command has finished executing, run the following
  • fastboot reboot
  • The phone will reboot. Wait until the phone has fully booted up into Android, and enjoy!

2nd Method: Instructions to unlock [for Android 7.1]

  • First of all, download and extract attached zip (SS2- Sharp_ss2_boot_unlock_files.zip, SAT -Sharp_sat_boot_unlock_files.zip).
  • Now download and install the ADB and Fastboot drivers.
  • You need to enable developer Option and OEM unlock on your phone
  • To Enable the Developer Option, Go to your Settings -> About -> Software Information -> More -> Now Tap on the Build Number 7-8 Times until you see a toast message “Developer option enabled“
  • Go back to settings -> Now you need to enable the OEM Unlock by going to Settings -> Developer Option and Enable OEM Unlock and USB Debugging
  • Now connect your phone to Computer using USB Cable.
  • When you connect your Phone to Computer, please wait until all the drivers get installed.
  • In your ADB fastboot folder open a command prompt window by pressing Shift Key + Right Mouse Click
  • Now type the command in your command window
  • adb devices
  • If you see a pop up to allow USB Debugging on your phone, Click OK
  • Now type the command below to reboot your phone to bootloader
  • adb reboot bootloader
  • Once your phone reboot into bootloader, make sure your phone shows the bootloader locked and then type the command below to make sure fastboot drivers are installed properly.
  • fastboot devices
  • This command will list the connected devices. If your phones serial number shows up you are good to go and may continue. If the phone is NOT listed this indicates that your drivers are not installed correctly. In order for you to continue, you must fix your drivers so that your phone is listed under fastboot devices.
  • If the phone has been recognized by the command above, proceed to unlock the bootloader
  • First of all, check if you have tryes left in device-type:
  • fastboot.exe oem cert_timecount get
  • If you see 0 you will be not able to unlock (unless you make changes) so STOP HERE! and visit the XDA forum here if >0 then go to next step.
  • Now enter the next command to get 16 digits serial number
  • fastboot getvar productid
  • Convert serial number to md5 hash ( use the link here https://www.md5hashgenerator.com/)
  • Now follow the next command and type
  • fastboot oem dm-verity [md5 hash generated from serial number (without quotes)]
  • You should see “OK” message on the screen.
  • You can now flash the new bootloader on your device
  • fastboot flash abl unlock.elf
  • Once again reboot to download mode by entering
  • fastboot reboot-bootloader
  • After reboot, finally type the following command
  • Remember that this step will wipe EVERYTHING off the phone
  • fastboot oem unlock
  • Now you can get unlock to flash critical (bootloader) partitions from where you can use fastboot flash abl (or xbl) files.
  • fastboot oem unlock_critical
  • The phone will reboot. Wait until the phone has fully booted up into Android, and enjoy!
  • When you have unlocked the device, repeat step 2 with commands
  • fastboot.exe oem cert_timecount set 100
  • I recommend to type above command each time you use fastboot, because each command used in fastboot makes this value less than before, and if it reaches 0, you will not be able to do anything with most OEM commands.
  • You can always relock the bootloader anytime by cmd:
  • fastboot oem lock

I hope this guide was helpful to Unlock Bootloader On Sharp Aquos S2 (ss2 / sat). If you have any queries or feedback, please leave a comment below.

By Unlocking the bootloader, your warranty can void. So take your own risk. We are at GetDroidTips will not be responsible for any bricking/damage to your phone while/after installing this ROM.

  • You need to download ADB and Fastboot Tools to your PC and Extract it
  • Download Android USB Drivers
  • Download Bootloader Unlock Zip

adb devices

adb reboot bootloader

fastboot devices

fastboot flash unlock unlockkey.bin

fastboot-android flashing unlock_critical

fastboot oem unlock-go

fastboot reboot

fastboot.exe oem cert_timecount get

fastboot getvar productid

fastboot oem dm-verity [md5 hash generated from serial number (without quotes)]

fastboot flash abl unlock.elf

fastboot reboot-bootloader

fastboot oem unlock

fastboot oem unlock_critical

fastboot.exe oem cert_timecount set 100

fastboot oem lock