Unbricking the Galaxy A10s: A Deep Dive into the Scatter File and Bit 8 Solution of UnlockTool

Samsung Galaxy A10s, a cheap but very reliable phone, is a phenomenon in many parts of the globe. However, the life of a mobile technician or of a developer who loves to modify the phone’s software with their own creativity becomes miserable with the Galaxy A10s Scatter File in just a few minutes .Download of the simplest but also most terrible cases is when, due to a firmware flash gone wrong, the device gets stuck at Samsung logo or starts repeating the boot process indefinitely (“dead after flash”). In a way – albeit soft – the unit is “bricked” and the user turned into a castaway.

Figuring Out the Why of the Phenomenon: What Makes A10s Stuck After the Flash?

Really very important to know the reason for the problem before seeking for the solution. The Galaxy A10s (model number SM-A107F) is a device powered by the MediaTek chipset. (MT6762) The procedure of firmware flashing is a complex one and part of the writing is done on the most sensitive partitions like boot, system, vbmeta, as well as the userdata partition.

The main issue causing the flash to fail or be incomplete is frequently:

Incorrect Firmware: The firmware used is not ideal for that particular region or hardware variant.

Unstable Connection: A situation like a USB cable loose or port interruption during the data transfer process will cause the operation to abort.

Faulty Tools: The software used for the flash that is not compatibility-aware of the device’s partitioning results in failures.

Corrupted Userdata: Errors in the userdata partition can make the Android system to exit initializing sequence and consequently, it will be stuck on the boot animation.

Typically, when using a tool such as Odin for a standard re-flash Download , the process cannot still fix the issues caused by the corrupted userdata partition or any other system errors in which the software has not been overwritten forcefully. In such a case, the low-level, partition-by-partition method is indispensable.

The Arsenal: Scatter File, UnlockTool, and CM2

The Scatter File (.txt): A scatter file outlines the detailed structure of a device’s flash memory along with the partition names, start addresses, and sizes. In such situation, a deeply bricked device might cause a generic scatter file to become useless.

UnlockTool: It is a versatile and pro-level software for FRP disabling (Factory Reset Protection) removal, unlocking, and repair of the device. An important aspect of it here is the setting “Bit 8” along with the advanced MediaTek engine. UnlockTool, unlike consumer-grade tools, gives a more user-friendly way of access preloader mode in low-level operations.

The “Bit 8” Setting: This is the key factor. In context, MediaTek flashing “Bit” methods are those used for giving the chip certain initialization instructions prior to the flash.

The Step-by-Step Repair Process

It needs precise work and the right files to carry out the repair. Here’s the main idea of the process:

Preparation: Get the firmware for the SM-A107F that is correct, tested, and without errors. Take the scatter file that is particular for the A107F and check if you have a version of UnlockTool or a similar tool like CM2 Miracle Box that is compatible and working.

Entering Preloader/BROM Mode: As the phone is dead, it is necessary to put it in BROM mode forcibly. Generally, the procedure is to unplug the phone completely and at the same time, press the Volume Up, Volume Down, and Power buttons and at the moment when you press the buttons, plug the phone into the PC with a USB cable. The tool will show the MediaTek USB VCOM port if the connection is successful.

Configuring the Tool:

In UnlockTool select the Samsung MTK tab.

Insert the scatter file that you have downloaded into the tool. The tool will then show the list of all the partitions.

Identify the firmware for the most important partitions: boot.img, system.img, vbmeta.img, lk.bin, and preloader.bin, etc. and then click on it.

The Critical Step: Locate and turn on the “Bit 8” feature. This is, in most cases, a checkbox of the tool’s or connection dialog.

Executing the Flash: After the set up of everything, the “Download” or “Flash” button should be pressed. The tool will first issue the Bit 8 command, forcibly erasing the problematic partitions. This process is less of a surgery than a typical Odin flash.

Completion and Reboot: After the flash is done and  green “OK” or “Success” message is displayed, the phone should be unplugged. A forced reboot can be done by holding the Power button for 10-15 seconds.

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