Monday, February 16, 2015

Lenovo S820, Change Modem Firmware to Get Better Signal Reception

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. I have baseband S820_v21 android 4.2.1 and build number S820_ROW_S124_140404..
    Can u tell me which modem i choose from there above... please help

    ReplyDelete
    Replies
    1. choose the one that same with youroperating system, actually you can choose what ever you want but betterto choose same with your os. Backup your modem first

      Delete
  2. i have downloaded Root Explorer
    I can find my modem in it and copy paste it to a safe place

    ReplyDelete
    Replies
    1. Look at this guide http://bit.ly/1pplXBM, you will see where to find modem file and backup it to the safe place

      Delete
  3. i have s820_ROW_s220
    which modem should i choose???

    ReplyDelete
    Replies
    1. Hi,
      If you not have problem with signal reception change modem not needed, if you ask which is you need i can give you answer you must try yourself, choose which one is better to use.

      Delete
    2. ok...thank you for your replies

      Delete
    3. Your welcome and thank you foryour visit

      Delete
  4. 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...

    ReplyDelete
    Replies
    1. hi,
      you could see on this guide http://bit.ly/1pplXBM, look at manual section , it will show which folder that store modem file

      Delete
  5. Hi Andy, I follow all the steps , but the modem doesnt change , when i check the Baseband Version, the original still appears and the phone have the same problem, can you help me?

    ReplyDelete
    Replies
    1. hi,
      have you meet the requirements ? ROOTED device with custom recovery installed, twrp or cwm must be installed on your device.

      or maybe you can try using manual way, look this guide http://bit.ly/1pplXBM as reference.

      Delete
    2. I use the Manual and Twrp ways and i still appears the old modem. :(

      Delete
    3. Are you mean your modem is unchange?
      Try using different modem file and see what happen, because if you already do the right way i think it will change

      Delete
    4. 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?

      Delete
    5. Try to change using mobile uncle but i don't have any guide about how to use mobile uncle. Try search at google how to useit to change freq on the mtk devices, but rooted phone needed to run mobile uncle

      Delete
    6. i use mobiluncle and doesnt appear this band, i will sell my cellphone , thanks for all you time!

      Delete
    7. Ok and good luck with new phone.

      Delete
  6. Hi Andy,
    My phone version is VIBEUI_ V2.0_1512_7.149.1_ST_S820
    Android (4.4.2)
    Should I use above method.

    ReplyDelete
    Replies
    1. yes, if you want to change the modem file.

      Delete
    2. 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

      Delete
    3. Does it work on 4.4.2?
      I tested S820.V51 and S820.V52
      through CWM.But nothing change.What is wrong?

      Delete
    4. It should be work if you got rooted phone and the right cwm or twrp. Baseband version should be change

      Delete
  7. 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?

    ReplyDelete
    Replies
    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.

      Delete
  8. Hi!
    For me, this solution worked: http://forum.xda-developers.com/showpost.php?p=58118377&postcount=5
    (My phone build number: S820_ROW_S223_150119; and the new baseband version with this solution: S820.V101; 2014/03/12 16:43)

    ReplyDelete
    Replies
    1. Thank you for your information, hope everyone that have problems like your can see your comment

      Delete
  9. Help me I'm stuck with GSM(2G) only !! No 3G in my S820_ROW_S124_140404. I've even tried changing with many basebands but still :( no luck !!!
    Please see all the three links below and suggest me the right modem.img ?
    1 http://postimg.org/image/4dddd6gif/
    2 http://postimg.org/image/nnkdwm2hj/
    3 http://postimg.org/image/mwrnqu047/

    ReplyDelete
    Replies
    1. Cannot see the image you attach, have you try to change setting -> network -> network mode to wcdma only. And what happen

      Delete
  10. 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.

    ReplyDelete
    Replies
    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.

      Delete
  11. kira2 modem yg paling bagus buat S820_ROW_S223 apa ya gan?
    soalnya saya sering no service di dalam ruangan

    ReplyDelete
    Replies
    1. Try one by one but for asian country i suggest china modem.

      Delete
  12. Hello Andy, do you have a backup file of Baseband modem S820.ROW.V105??? it's the best modem for us living in the Philippines. Thanks!

    ReplyDelete