[Guide] Fix Missing IMEI/No Service Issue on Honor 3C (H30-U10) with KitKat OS

Sometimes it so happens that even after successfully installing the Chinese KitKat firmware on international Honor 3C (H30-U10), you encounter a strange network issue that results in total loss of signals with ‘No Service’ onscreen message. This is actually engendered by the loss of phone’s IMEI data during the installation of unofficial ROMs/firmwares. The good thing is that you can easily bring back this IMEI with a minor patch using our concise step-by-step tutorial given in this article below.

Fix Missing IMEI (No Service) Issue on Honor 3C

1. Using Custom Recovery

1. Prerequisites

• Int’l Huawei Honor 3C – H30-U10 variant with Chinese KitKat ROM
• A USB cable and VCOM driver installed on PC (download here – size: 9.57 MB)
• Live TWRP custom recovery (download here – size: 8 MB)
• Honor 3C flashable KitKat modem patch (download for China | Malaysia)

2. Procedure

1. In order to flash the Modem patch, you need to have a custom recovery like TWRP or CWM first. Live TWRP Recovery is one great workaround for these purposes (however, it only works on Jelly Bean and up to v4.9.16 KitKat)
2. Extract the downloaded “Live TWRP Honor3C.zip” on your PC.
3. Copy the extracted “dload” folder (containing update.app and au_temp.cfg) to the root directory of your phone’s SD card i.e. without placing it inside any folder. If the SD card already contains dload then replace that with this one.
4. Also copy the “Fix IMEI Honor3C.zip” package  to the dload directory.
5. Next, Reboot your phone normally. You’ll automatically be directed to TWRP recovery upon boot.
6. Tap “Install” and then navigate to Sdcard → dload → Fix IMEI Honor3C.zip. Make sure “Zip file signature verification” is unchecked. Swipe to confirm.
7. Once it gets completed navigate to Home → Advanced → File Manager → Sdcard → dload and delete the file named “au_temp.cfg”.
8. Swipe to confirm the delete and finally reboot the phone in normal mode.

Note: If you’re using >v4.10.1 KitKat firmware or the new EMUI 3.0 then Live TWRP probably won’t work and you’ll have to flash a permanent CWM/TWRP recovery on your device.

2. Using Mobileuncle Tool

If the first method didn’t work or you’re using a newer firmware then you can attempt to rewrite both the IMEIs using Mobileuncle MTK IMEI Write Tool but you’ll need root access for this. Here’s how you do it.

1. Download IMEI Write Tool v1.2 and extract it on your computer.
2. Now open the tool, you’ll see most of the text in strange chars as it is mainly written in Chinese.
3. Type “Y” and press enter. It’ll then prompt you to enter the IMEIs.
4. Next, type the first IMEI number and hit enter (IMEI numbers are usually written on the back of the phone under the battery).
5. After that write the second IMEI number in the input field and finally press. You’ll now see a file named “IMEI.bak” in Mobileuncle’s folder.
6. Transfer “IMEI.bak” to the root directory of your phone’s SD card.
7. Download Mobileuncle MTK Tool app on your phone and install it
8. Run the Mobileuncle app, go to IMEI Backup and Restore and choose “IMEI.bak”.

The no service issue should now be fixed. Wait for a few minutes before the phone searches for signals. If there’s still any problem feel free to comment about it below!

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