[hovatek]

If you encounter Null IMEI, Unknown Baseband, no signal, no / weak 3G or 4G on your Spreadtrum (SPD) Android phone then you're having NV problems. NVRAM issues could even extend to WiFi and Bluetooth issues. This guide will explain how to resolve NV issues via backup and restroe. Note that reflashing the right firmware often fixes unknown Baseband.

Requirements

• Setup Infinity CM2 dongle
  
• Download and Install CM2SPD @ http://dl1.infinity-box.com/00/pub.php?d...&uid=18069
  
• Install Spreadtrum (SPD) SCiU2 drivers
  
• USB Cord
  
• PC
  
• 2 Spreadtrum Android phones of the same model (one with NV issues and one without NV issues) to backup then flash NV
  

Steps to backup and flash NV on a Spreadtrum Android phone using Infinity CM II

Follow the steps below to use Infinity Chinese Miracle II SPD to backup and restore NVRAM

See the video tutorials below or at https://youtu.be/lmCRow1z1nQ

• Launch Infinity Chinese Miracle II (CM2) SPD module
  
  
  
  
  
  
• Select your phone's chipset under Settings > CPU (refer to https://www.hovatek.com/forum/thread-13054.html )
  
  
  
  
  
  
• Click the Security tab
  
  
  
  
  
  

Reading / Backing up NV

1. Click Read NV
   
   
   
   
   
   
2. Once you see ====Wait for phone..., power off the phone without NV issues (still with battery in it), hold the volume down button then connect to the PC via a USB cord
   
   
   
   
   
   
3. The phone should get detected
   
   
   
   
   
   
4. CM2 SPD should start reading the phone's NV
   
   
   
   
   
   
5. In the Window that pops up, navigate to the location you wish to save the NV then click Save
   
   
   
   
   
   
6. You should get a Done message once NV backup is complete (the file is usually named something like Cxxxxx_SPDNV.spdnv )
   
   
   
   
   
   

Restoring / Flashing NV

1. Still under Security, tick BB Fix Mode (to repair Baseband) then click Write NV
   
   
   
   
   
   
2. In the Window that pops up, navigate to the location of the NV file (SPDNV.spdnv) , highlight it then click Open
   
   
   
   
   
   
3. Once you see ====Wait for phone..., power off the phone having NV issues (still with battery in it), hold the volume down button then connect to the PC via a USB cord
   
   
   
   
   
   
4. The device should get detected
   
   
   
   
   
   
5. CM2 SPD should start restoring the NV to the phone
   
   
   
   
   
   
6. You should get a done message once restore is complete
   
   
   
   
   
   
7. Power up the device(s)
   

Important Notice

• Infinity CM2 ideally requires a hardware dongle. If you only install the setup module and run, it won't work
  
• Should you decide to use a loader version, your antivirus might flag it. You are entirely responsible for allowing the tool to run anyway
  
• Its important you only restore NVRAM backed up from your device or at least a working phone of the same model. Doing otherwise could brick the device
  
• Do Not interrupt the backup / restore process or this could brick the device
  

Video Tutorial

In this video tutorial, I'll be explaining how to backup a Spreadtrum Android phone's NV using Infinity CM2 SPD. Its very important you've set it up, installed your Spreadtrum drivers and have the dongle connected to your PC. Once you've done these, launch the Infinity box CM2 SPD module. and wait for the dashboard to come up. Once it comes up, under Settings - CPU, select your phone's chipset. We have a guide on how to identify your phone's chipset so check it out.

Go to the Security tab where you're going to be backing up the NV. I usually have Not Responding error on my PC because I'm running some processes at the moment so just bear with me okay? Under Security, go to Read NV and you click on it (green text). That's where you're going to be backing up the NV. You have to get a working phone without NV issues. By NV issues, I mean a phone having unknown baseband, no network (signal), null IMEI, WiFi or Bluetooth problems etc That's an NV problem.

So what you'll want to do now is to power off the working phone, hold the volume down button, battery inside then connect it via USB cord. You should have a detection like this. What you're essentially doing here is that you're backing up a working phone (which doesn't have NV issues) then flashing the NV to a phone having NV issues. At this moment, we're reading NV from a working phone. The phone has been detected and you should have a Window popup. It has started reading NV.

In this Window, you navigate to wherever you want to save your Spreadtrum NV and click on Save. Its usually a .spdnv file. Backup complete [Elapsed] then you have the path to where the NV has been saved usually a file in this format. Now, you've backed up the NV from the working phone now you want to flash the NV to the bad (bricked) phone. Disconnect the working phone then click on BB Fix Mode and Write NV (red text) In this Window, select the NV you just backed up then you click on Open. That is going to load the NV.

At this point, you'll want to get the phone having NV issues, power it off and keep it on stand by. Wait till you see Wait for phone.. Now, hold the volume down button and connect it to the PC via USB cord. Don't forget the battery should be inserted. Restoring NV.. [Writing NV] You can also backup your NV just for safe keeping, not necessarily (till) when you have NV issues. Elapsed (Done).

So that's how to read and write NV to a Spreadtrum phone using Infinity Chinese Miracle 2 SPD module.