Intro to Unisoc (Spreadtrum) Android Phone Software Repairs

Name: Intro to Unisoc (Spreadtrum) Android Phone Software Repairs
Rating: 3.5 (9 reviews)

An introduction to fixing software issues on Unisoc (Spreadtrum) Smartphones and Tablets.

Created byTeam Hovatek

Last updated 7/2026

English

What you'll learn

Identify Spreadtrum devices while in working or bricked state
Identify various Spreadtrum firmware formats and how to flash them
Install Spreadtrum drivers for flashing
Backup Spreadtrum firmware
Flash Spreadtrum firmware
Bypass Factory Reset Protection (FRP)
Fix NVRAM issues (null IMEI, unknown Baseband, invalid WiFi & Bluetooth address, 2G network only etc
Root most Spreadtrum Android devices
Easily port TWRP custom recovery for Spreadtrum devices
Deal with DM_Verity when flashing custom recovery
Boot into recovery, factory, safe and fastboot modes
Unlock an Android device's Bootloader
Flash files via fastboot
Setup NCK Pro box & Infinity Chinese Miracle II (CM2) dongle
Use hardware boxes / dongles like Miracle box, Infinity CM2, NCK Pro box etc
Bypass pattern & PIN lock

Course content

9 sections • 52 lectures • 2h 57m total length

Getting Started1:00
How to Identify a Spreadtrum device0:33
Identifying Spreadtrum firmware / rom formats1:06
Let's see how much you've learnt so far

What's covered in this section0:20
How to unpack a .pac file2:48
Load a pac file with the research download tool, extract the firmware, locate the image files folder, and copy or use the extracted firmware.
How to repack a .pac file using Research Download tool12:24
Repack a pac file for a phone model using the research download tool, loading fdl1 and fdl2 with corresponding .img, .bin, and .bmp files, then save the pac.
Let's see how much you've learnt so far

What's covered in this section0:26
How to install Unisoc / Spreadtrum SCiU2 driver3:32
Learn to manually install the Unisoc/Spreadtrum SciU2S driver on Windows, selecting the correct architecture, loading the .inf file, and handling unsigned driver warnings and Code 10.
How to setup ADB & Fastboot3:48
How to fix ADB or Fastboot detection problems3:38
Let's see how much you've learnt so far
What's covered in this section0:47
Let's see how much you've learnt so far

What's covered in this section0:25
How to backup SPD firmware using Infinity CM2 dongle17:26
Master backing up SPD firmware on Spreadtrum Android phones with Infinity CM2 SPD, detailing driver setup, chipset selection, reading firmware, and saving the backup.
How to convert CM2 pac.sc to pac file3:22
Convert a CM2 SPD pac.sc backup into a SPRD pac file using Infinity CM2 SPD's FW Converter. Select the pac.sc, save the pac file, and wait for completion.
How to backup SPD firmware using Miracle box4:12
Back up SPD firmware from a spectrum device using miracle box, after installing spectrum drivers and launching miracle box. Connect the device, initiate read, and save the completed backup.
Let's see how much you've learnt so far
How to backup Unisoc (SPD) using CM2 SP210:39
You'll learn how to use the new CM2SP2 to backup Unisoc (SPD) firmware

What's covered in this section0:29
Build Number is everything!2:12
How to use Research, Upgrade or Factory Download tool6:10
Use the Research Download tool to flash Spreadtrum Android phones: load the correct pac file, select items, and start flashing. Resolve NVdata and driver issues to ensure a successful flash.
How to flash single file to Spreadtrum using Research Download tool3:42
Learn to flash a Spreadtrum nvram dump using the research download tool by loading pac firmware, selecting prodnv and w_fixnv, adjusting backups, and initiating flash while holding volume down.
How to flash SPD using Miracle box2:01
Learn how to flash SPD with Miracle Box by selecting SPD tab, enabling write, choosing chipset and PAC firmware, adjusting baudrate if needed, and starting flash while holding volume down.
How to flash SPD using NCK Pro box3:51
How to flash SPD using Infinix CM2 dongle5:43
Flash Spreadtrum phones with CM2 SPD using pac or pac.sc; install drivers, select CPU, flash; pac.sc is Infinity box dump; pac works with other tools.
How to flash Unisoc (SPD) using CM2 SP26:17
You'll learn how to use the new CM2SP2 to flash firmware
Let's see how much you've learnt so far

What's covered in this section0:14
How to bypass FRP using Fastboot1:09
How to bypass FRP using NCK Pro box1:08
Learn to bypass FRP on Unisoc devices using the NCK Pro box. Use flash mode utils to select the model or generic CPU and remove FRP.
How to bypass FRP using Infinity CM2 SPD3:13
Learn to bypass FRP on Spreadtrum Android devices using Infinity CM2 SPD by installing drivers, selecting the chipset, and using the Format FR / Clear FRP from the Security tab.
How to bypass FRP using Research Download Tool2:39
Discover how to bypass frp on spreadtrum android devices using the research download tool, covering prerequisites like spreadtrum drivers and pac files and the flash-based bypass workflow.
How to build an FRP & Privacy Protection Password bypass .pac file4:04
Let's see how much you've learnt so far

How to boot into Diagnostic (Diag) Mode0:56
How to write IMEI using Engineer Mode6:53
Use engineer mode and the secret code explorer to write the IMEI on rooted Unisoc Android devices, then flash baseband, reboot, and verify the IMEI.
How to use WriteIMEI tool1:41
Use the WriteIMEI tool to read device info in diag mode, select the COM port, and write the IMEI, then save to enable Bluetooth, wifi, and serial number addresses.
How to write IMEI using Infinity CM2 SPD4:13
Learn to write IMEI to a Spreadtrum Android device with Infinity CM2 SPD, select CPU chipset, enter the first 14 digits (15th auto), and verify after reboot.
How to write IMEI using Miracle box2:52
Learn to write IMEI on a spreadtrum device using miracle box, enabling IMEI, selecting the SPD tab and chipset, and entering the original IMEI.
How to write IMEI using NCK box1:23
How to backup and restore NVRAM using Infinity CM24:30
Back up nvram from a working Spreadtrum phone with Infinity CM2 SPD by reading nv and saving as a .spdnv, then flash it to a phone with nv issues.
How to backup and restore NVRAM using NCK box6:54
Let's see how much you've learnt so far

What's covered in this section0:05
How to boot into recovery mode3:01
Learn how to boot a Spreadtrum Android phone into recovery mode, including powering off first and variations in power and volume button combinations for stock and custom recovery.
How to unlock Bootloader (General)3:24
Unlock the Android bootloader by enabling USB debugging and OEM unlocking, then use ADB and Fastboot to reboot into bootloader, issue the unlock command, and verify unlocked.
How to unlock Bootloader (unlock token)4:32
Unlock the bootloader on a Unisoc Android 9 device using an unlock token, a modified fastboot, private key, and scripts on Linux, covering token generation and data erase.
What is rooting?1:00
How to root an MTK device using Magisk Manager + Boot.img10:24
Custom recovery and DM verity1:49
How to port TWRP recovery2:45
Fixing TWRP 0MB Internal Storage4:37
Gain root access and decrypt userdata by editing the fstab to encryptable, then reset in stock recovery and reboot. Verify encryption is off and reflash your custom recovery.
How to create a custom signed vbmeta.img using AVBtool3:16
Learn to create a custom signed vbmeta.img with AVBtool using your private and public keys, sign the recovery partition, pad with vbmeta_pad.py, and flash via fastboot.
How to sign Unisoc images1:34
Sign Unisoc images with the AVB tool, using your private key to generate a public key and sign vbmeta, then sign stock recovery (recovery_stock.img) and boot images before flashing.
Let's see how much you've learnt so far

Requirements

Internet access
Windows Computer
Spreadtrum (SPD) Android phone to practice (minimum of Lollipop recommended)
Basic computer knowledge

Description

Note: Spreadtrum (SPD) has been re-branded to Unisoc so these names might be used interchangeably during the course

Whether you're a novice looking to start a device repair outfit or trying to save money by learning to fix your own Unisoc / Spreadtrum device issues, this course is exactly what you need to build a solid foundation.

This course assumes you have no prior knowledge; therefore, it starts from the ABC of Unisoc / Spreadtrum software repairs with practical examples and scenarios.

In this course, we cover how to use both free and paid tools (Boxes / Dongles) to perform software repair tasks. For paid tools, you will be required to have purchased both the hardware and activation from either the manufacturers or official resellers

What are boxes / dongles and how do they work?

A box / dongle is a hardware component which some software require to run on your PC. This is an extra layer of security for the developer’s tool against piracy and cracks. What this means is that you’ll need to buy the hardware box / dongle in order to run the developer’s tool.

Hardwareless paid software are now on the rise so all that's needed (for such tools) will be to pay for activation and start using.

Who this course is for:

Anyone who wants to learn Android software repairs either to save money or for the knowledge
Anyone who wishes to start a phone repair shop / outfit
Intermediate to advanced phone software repair outfits looking for a refresher course

Intro to Unisoc (Spreadtrum) Android Phone Software Repairs

What you'll learn

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Course content

Introduction3 lectures • 3min

Dealing with pac files3 lectures • 16min

Installing Spreadtrum drivers5 lectures • 12min

Boxes & Dongles3 lectures • 2min

Backing up a Spreadtrum device's rom5 lectures • 36min

Flashing Spreadtrum firmware8 lectures • 30min

FRP & Privacy Protection bypass6 lectures • 12min

How to fix null IMEI and NVRAM issues on Spreadtrum devices8 lectures • 29min

Development / Mods11 lectures • 36min

Requirements

Description

Who this course is for: