Here’s what you need to download the official BLU Studio 5.5 HD S150U firmware flash file onto your computer. You can then use one of the compatible flashing tools to update the firmware on your smartphone or tablet.

Flashing tools were initially developed by the companies that were associated with the device’s hardware, kept in-house, used in the back rooms of smartphone repair centers to fix common mobile device-related problems. The tools were later published on the Web for anyone to use. Now you can solve the same kinds of issues that were once left up to those repair centers: bootloops, soft-brick situations, software errors, software bugs, update errors, so forth, by downloading the software onto your computer at home instead. What’s more, installing the BLU Studio 5.5 HD S150U flash file is an easy task, thanks to the flashing tool’s user-friendly interfaces that usually require just one click before the flashing is underway.

Most third-party developers who create tools for helping you customize your devices—the teams that work on custom recovery images, rooting applications, et cetera—recommend sticking with custom software if you have already changed the system partition or replaced the stock recovery partition with a custom one. If you are to go back to stock Android on the device, though, they strongly suggest flashing the firmware yourself instead of accepting the over-the-air updates. This is because OTAs can create unexpected behavior since they are often only patching over existing software instead of completely replacing it.

The flashing tools such as the smartphone flash tool are always computer applications. On most occasions, these apps are relatively small files and will not take up much hard drive space.

You can sometimes have a choice of what flashing tool you want to use to flash the BLU Studio 5.5 HD S150U stock firmware file. You can flash Stock ROMs with tools that work for either the system chip found in the device’s hardware, the firmware file type, or on occasion, apps that are designed to work for a particular manufacturer.

What Is Android Firmware?

Firmware is the operating system and its applications that control how the smartphone or tablet that runs on Android operates. While you may see the words “software update available” on your device’s display, we call it firmware to highlight its close relationship with the device manufacturers hardware.

If you prefer technical jargon, firmware is the specific programming that gets written to a device’s non-volatile memory. The firmware gets added to the device during the manufacturing process and is the middleman in helping software run on the hardware. Firmware can be written as read-only memory (ROM), erasable programmable read-only memory (EPROM), or flash memory.

The Android operating system is more open than much of its competitors in iOS, Windows 10 Mobile, and Tizen. You always get firmware running on your device out of the box, but if you do not like it, you can swap it over with custom firmware or other firmware versions that were made for your device. This flexibility helps with troubleshooting, or if you know you would prefer a different Android version that was made available.

Why Reinstall Stock Firmware?

Did you think you may need to restore the stock firmware on your device? Here are some of the things that you can achieve with stock firmware files:

  • Upgrade or downgrade the version of Android on your device
  • Fix common mobile device-related problems, such as unbearable bugs in the software
  • Remove custom recovery images such as TWRP
  • Unroot the Android operating system, regardless of what method/tool you may have used to get root access
  • Unbrick your smartphone or tablet
  • Reinstall the operating system
  • Fix invalid IMEI problems

BLU Studio 5.5 HD S150U Firmware Flash File Download Links

File Name: Blu_Studio_5.5_HD_S150U_V13

Firmware FileDownload flash file

How to Install BLU Studio 5.5 HD S150U Flash File Using Spreadtrum Upgrade Tool

1. Download the Spreadtrum USB driver and install it on the computer that you plan on using for the flashing.

2. Download the PAC stock ROM (firmware file) that you want to flash on your BLU Studio 5.5 HD S150U device onto the same computer you plan to use for the flashing.

3. Download the latest version of the Spreadtrum Upgrade Tool on your computer and then extract the file by right-clicking on it and selecting the “Extract” option from the menu.

4. Open the Spreadtrum Upgrade Tool folder and click on its application to launch the tool. (This will be the file in the folder that has the Spreadtrum Upgrade Tool icon next to it.)

5. Turn off the smartphone and then connect it to the computer with its USB cable.

6. Click on the “Load Packed” button from the top left-hand side of the Spreadtrum Upgrade Tool’s interface.

7. Browse your computer for the firmware file that you downloaded earlier and then upload it to this location.

8. Click on the “Start Downloading” button, and then the flashing of the firmware begins.

It’s normal for your Android device to reboot by itself during the firmware installation. Keep waiting until you can see the green “Passed” message on the Spreadtrum Upgrade Tool interface.

For a more detailed guide, you can check out the full article on how to flash a PAC stock ROM on an Android smartphone.

Important Notes

Back Up Your Data: You should always back up your data before you begin flashing new firmware files to your smartphone or tablet. All of your pictures, music, videos, documents, etc. should be still on your device after you have updated the firmware, but you may need to restore the contacts and applications from a backup.

Wipe Cache and Factory Reset: Some people claim that taking a factory reset isn’t necessary after updates, but at the very least you should wipe the system cache after installing new firmware. This way you can help eliminate any performance issues and battery draining bugs. Taking a factory reset is the best way of avoiding common problems many users face after applying software updates.

FAQ

There are some common questions people have before installing firmware files. Here are the ones we are regularly asked:

How to Unroot BLU Studio 5.5 HD S150U When Installing New Firmware

There can often be a variety of ways to unroot a device that runs Android, and they depend on what method you used to get root access. If you installed SuperSU for root access, then you can open the app and find the option to unroot directly from SuperSU’s settings. On the other hand, if you do not have SuperSU, and you do have a BLU smartphone or tablet, then you can always unroot by installing the stock firmware. Once you have followed the guide above, your device will automatically be unrooted. You can verify that is the case by installing one of the many applications from Google Play that checks for root access. As long as you are using a reliable app, then typically it will not lie about the root status of your mobile device.

How to Restore Stock Recovery on BLU Studio 5.5 HD S150U When Installing New Firmware

One of the most common reasons for installing the stock firmware is to remove a custom recovery image and revert to the stock recovery. There is nothing you need to do extra to reinstall the stock recovery on your device; when you install the stock firmware, it will automatically install the stock recovery partition on the device once again.

Additional Firmware

You can download Android firmware for other Android devices if you have another smartphone or tablet from a different manufacturer.

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