How Backup Android NVRAM [MTK MT6589, MTK6589T, MT6595, MT6582, MT6577, MT6572]

Note : Root or CWM recovery is required to backup or restore your NVRAM using this method

Have you ever had a problem with your MTK6582, MTK6595, MTK6577, MTK6589, MTK6589T, MTK6575, MTK6572 NVRAM.

Possibly you're seeing MTK Baseband Unknown in your phone settings > phone info after you flashed a ROM with SP Flash Tool or factory reset.

This is what saved Gizbeat after he bricked his baseband.

Normally it's quite easy to find a backup ROM if your phone is moderately popular, but NVRAM in .tar and .bin are often more difficult to come by.

If you don't have a full 'raw' backup with nvram.bin and userdata_nvram_only.tar, take a few minutes and at least make this NVRAM baseband and folder backup.

What you'll need

ADB Drivers (See MTK General Tools Sub-Forum)
MTK Droid Tools (See MTK General Tools Sub-Forum)
A Rooted Phone


 What to do

1. Install ADB Drivers
   
2. Extract MTK Droid Tools
   
3. Run MTK Droid Tools
   
4. With your phone on, connect it to your PC via USB
   
5. Root Shell is required. You need to be booted into ClockworkMod Recovery (CWM) or be fully rooted already. If fully rooted, the square should be yellow. If the square is yellow, then click the root button in bottom right corner. The little box should turn green which means you should then have shell access to backup or restore NVRAM.
   
6. You may see a Super User request pop up during this procedure on your phone's screen. Allow it.
   
7. Click NVRAM/IMEI
   
8. Make sure both '.bin' and '.tar' are checked.
   
9. Click backup
   
10. Save them to a place where you'll be able to find them
    

Restore

To restore NVRAM to your MT6589, MTK6589T, MT6595, MT6582, MT6577, MT6572 phone, follow the same procedure but click 'Restore' and direct it to the backups.