Lenovo S820, Change Modem Firmware to Get Better Signal Reception

16 Feb 2015

Lenovo S820, Change Modem Firmware to Get Better Signal Reception – Lenovo S820 modem firmware can be change if needed, when you have bad signal reception maybe you wanna try to change Lenovo S820  modem firmware, this is one of advantage when you have Lenovo S820 with root permission.
Today i will post a guide how to change Lenovo S820 modem firmware so you can get better siganl reception, but always remember everything once you change it you could never be back to your old modem firmware except you backup it first. This guide has possibility to brick your device and erase your data so please consider it before start following this guide.

Disclaimer :
This guide for educational purpose only, We not responsible if your device bricked after following this tutorial. Even this guide is already tested but it has possibility to brick your phone, (DWYOR)


Lenovo S820, Change Modem Firmware to Get Better Signal Reception

Requirements :

Downloads :
  • S820.V12_modem ↦ used in Chinese firmware: S129, S135, S137, S139 (Android 4.2.1)
  • S820.V17_modem ↦ used in ROW firmware: S114, S115 (Android 4.2.1)
  • S820.V19_modem ↦ used in ROW firmware: S117 (Android 4.2.1)
  • S820.V50_modem ↦ used in the Chinese firmware: S507, S512 (Android 4.2.2)
  • S820.V51_modem ↦ used in Chinese firmware: VIBE 1343 (Android 4.2.2)
  • S820.V52_modem ↦ used in the Chinese firmware: VIBE 1346 and above (Android 4.2.2)
Lenovo S820, Change Modem Firmware to Get Better Signal Reception
  1. This guide will use TWRP custom recovery, but CWM also have the same menu as TWRP so you still can follow this guide using CWM custom recovery.
  2. Download the modem file you are going to flash on your device. Move or copy the modem files to your SD card root, don’t place it inside the folder.
  3. Turn off your device, press and hold Power button + Volume Up + Volume Down button and release until you can see TWRP main menu. This combination button will bring your device to boot on recovery mode.
  4. On the TWRP select Install ↦ Select Zip to Install navigate to your SD card where do you save the modem file and select it.
    Lenovo S820, Change Modem Firmware to Get Better Signal Reception
  5. When you already select it, just Swipe to Install. Installation progress will be show on the next windows, this installation only take 10-15 seconds. Select Reboot after finish install modem file.
  6. Boot normally and confirm with go to System Setting ↦ About Phone ↦ look on the Baseband Version make sure it same with the downloaded modem file.
  7. Done.
I hope this guide can help you resolve the signal reception on your Lenovo S650, if you got problems or found broken links regarding this guide please leave any comments. and thank you for visit.
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38 comments
  1. Hi Andy
    One of my friend also have lenovo s820 and i want to copy modem file from his phone. how can i copy it and which files i need to copy and where i should paste it in my phone. plz tell me,
    Thanks in advance…

    1. Problem fixed my friend , all I needed was to rename the file to modem_1_3g_n, the signal is better but i live in venezuela and the 1900mhz band does not appear in the modem. You know of any way to activate this band in the Chinese model?

    1. could not say which one, different country have different network freq, so you must try one by one and pick which is the best modem file to use in your country.
      once you have root and install custom recovery on your device it easy to try one by one

  2. Hi, i 'm from Greece. I own the CN s820 withe the latest ROW rom, the s820_row_s223_150119 and the modem firmware is v105 but i dont have signal at all.I tried the latest vibe rom but nothing again.Is there any newer modem file?Which one is for my country?Can i try something else?

    1. hi,
      if you don't have any signal at all try check your IMEI, using dial *#06# if it show invalid then follow this guide http://bit.ly/1teLvmQ, if not then the problem maybe in modem file. If you ask me where is for your country then i cannot give you an answer you must try one by one because result from one country to another is different.

  3. HEHE it's impossible the way which Adam said
    because My phone also its build number is : S820_ROW_S223_150119; and baseband S820.ROW.V105 and I tried flashing modem.S820.v101 in TWRP 100% successfully but still my modem doesn't change… it remains the same(V105) and when switching it to wcdma only no network available at all .. It works only in GSM(2G) but I want is 3G not that poor gsm freq.

    1. first, you said your phone already rooted right? if you phone already rooted install TWRP using mobileuncle is more easy. just copy recovery.img to sd card. open mobile unlce and select recovery update, from recovery update you can choose recovery.img and flash it to your device.
      second, try manual method to change the modem firmware, remeber to flash modem file through recovery / TWRP it need you phone to be root.

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