- Install Stock ROM using SPD Flash Tool:
- First, go to the download and extracted SPD Upgrade Tool folder on your computer.
- You will find the UpgradeDownload.exe application > just install it on PC.
- Now Tap on the Load Packet option to load the firmware file with the (.pac) extension, which you have downloaded earlier.
- After loading the (.pac) file, connect your phone to PC/Laptop and click on the start button to start flashing.
- Wait until the complete process. Have some patience.
- Your phone will boot automatically after successful installation.
- Now, you have successfully upgraded the Stock ROM on your Spreadtrum device.
- Enjoy!

Device Info file : _Android_info.txt
Patch Level : OPM2.171019.012
Display ID : J5-XPH91-Note20-Welcome-20201209
Ver. Incmt : 1520330173
Ver. CodeName : REL
Ver. Release : 8.1.0
Sec. Patch : 2018-01-05
Build Time : 09.12.2020
Product Model : Mito A67
Product Brand : Mito
Product Name : BP_266
Product Device : A67
Product Manfct : Kimfly
Product Info : A67
Product Board : Kimfly
Board Platform : sp7731e