Nvram Imei Fix

0 views

Skip to first unread message

Anthony Small

unread,

Aug 3, 2024, 3:55:45 PM8/3/24

to vutowealththumb

I've tried to set it with the engineering mode (send AT+ command), but it refuses saying that the operation is not allowed on a "userbuild" (and yes, I've tried to insert spaces at many places between or after some symbols).

I've seen people recommending to delete the whole nvram folder (on many sources and people replying back that it worked for them). But I don't know what is the purpose of that folder (I do know what is a non volatile RAM, but I have no clue of the impact of deleting it on Android).

The Invalid IMEI is a common problem that mostly occurs in Mediatek based Android smartphones, including Xiaomi Redmi, Micromax, Oppo, Samsung, Vivo, HTC, Sony, etc. The issue generally happens when you install a custom ROM, update your Android device, or manually modify the IMEI.

A null IMEI or unknown Baseband could make your phone unable to detect SIM Card(s), network signals (Emergency Mode), make calls or dial shortcodes (to check your account balance, etc). This is because your Baseband, IMEI, WiFi & Bluetooth addresses are important for radio communication.

Quite a number of MTK users have been having this issue on their MTK devices after flashing one ROM or another. This issue is mostly caused by wiping / corruption of the Secro and NVRAM (or NVDATA) partition(s). The Baseband and radio (for network signal) are controlled by the NVRAM (located in data/nvram/md/NVRAM/NVD_IMEI) and a file called MP0B_001.

Before you start repairing, ensure that your Mediatek phone has a valid Baseband (not NULL Baseband). If your Baseband is unknown then download the firmware for your model and flash your phone. Flashing the firmware (or at least Secro ) ought to restore Baseband. With Baseband regained, you can then proceed with fixing IMEI

When you encounter an unknown Baseband and NULL IMEI, the first thing you need to fix is the unknown Baseband by flashing the Stock ROM / firmware for the exact phone model using Odin.Once that is done, you can then write an IMEI to the phone

Sir i acdentaly flashed my micromax unite 2 and lost my imei.now i am on the official kitkat rom bt still both sims show invelid imei.does this procedure works with it or i have to flash 5.0 And try itit?

2. What is the difference between nvram.bin file and modemdb and apdb files that comes with stock ROM? I am able to fix my invalid IMEI problem permanently using Maui Meta 3G tool but the serial number is still all zeroes.

Anyways what I remember is that you need correct modem database file to fix IMEI for K4 Note (MT6753 chipset). This is a very rare database file which I think I found on either Chinese or Russian site when I fixed my device. I had bookmarked the site but it is lost due to crash. Anyways I have managed to recover on file from my crash system, not sure but hopefully it is the one. Here is a Google drive link for it

Note- Despite K4 Note being a dual SIM slot phone, you will initially see tab for entering IMEI for 1st SIM slot only, since IMEI numbers are lost. Once you successfully write the correct IMEI for 1st slot, option for entering IMEI for second slot appear automatically

I tried using Maui Meta 3G to fix my IMEI in lenovo k4 note, but Maui Meta 3G is not getting connected , can to tell me which drivers u used? I have been trying from morning wth no luck. Could you please help me out?