How to Install Stock ROM on Symphony I99 (Firmware Guide)

Want to flash the stock ROM file on your Symphony I99, then you are in the right place. In this guide, you can flash the stock firmware file to troubleshoot any issues or problems on your device. Yes! With this guide, you can resolve problems such as WiFi and Bluetooth issues, unbrick your device, resolve lag or bad performance, and also fix any software related problems.

To flash the stock ROM file on your Symphony I99, we are using the SPD Flash tool aka Spreadtrum Flash Tool as this device is powered by Spreadtrum SoC. We have shared all the pre-requisites files to download and install the stock ROM on your device.

Why We Need Stock Firmware?

Stock Firmware or a Stock ROM is official software that is designed by the OEM manufacturer for a particular device. This file is required to fix any software related issue on your Symphony I99. If you are facing any problem with your device, your final attempt will be to re-install the stock ROM. This way, you can restore your device back to stock ROM. This guide will be more useful to those users who always want to try rooting, installing mods, or custom ROM.

Advantage of Stock ROM:

Here are the answers to why you need to download and save the Symphony I99 Stock ROM flash file on your computer.

• If your device is dead, you can unbrick using the Stock ROM file
• You can fix or repair the IMEI on your device using DB files from Stock ROM
• Remove any malware or Adwares from Symphony I99
• You can fix the boot loop issue on Symphony I99
• Fix Unfortunately, the app has stopped error on Symphony I99
• Fix Network related issue
• Patch Boot image to Root using Magisk: Mediatek Guide or Spreadtrum Guide
• You can unroot Symphony I99
• To Reset or Remove FRP on your device: Mediatek FRP Guide or Spreadtrum FRP Guide
• Restore Symphony I99 back to Factory State

How to Flash Symphony I99 Firmware File

Before installing the Stock ROM on your Symphony I99, you should download the firmware file. Then download and install the USB Drivers and flash tool on the PC as well. Once you’re done with these, you can proceed to the steps below. But let’s take a quick look at the Stock Firmware importance and firmware details below.

Pre-Requirements:

• Supported device: Symphony I99
• Make sure to charge your device more than 50%
• You need a PC or Laptop with a USB cable.
• Take a complete backup using any method given below
  • Full Data Backup without Root
  • Nandroid Backup via TWRP
• Download Drivers and Tools: Spreadtrum USB drivers, SPD Flash Tool, and Android USB Drivers

Download Flash Files

Software Details	Download Link
Flash File Name: Symphony i99_HW1_V8 s9863a3c10 File Size: 1 GB Android OS: 10.0 Password: i99mn	Download Link

Instructions to Install: via SPD Flash tool

Now, without wasting any more time, let’s jump into the firmware installation steps below:

Guide to Install Stock ROM using SPD Flash Tool

That’s it, guys. We hope that you’ve installed the Stock Firmware on your Symphony I99 device successfully. Feel free to ask in the comments below for any queries.