How to fix SIM card issue on Redmi Note 4
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[Solution] Redmi Note 4 cannot detect SIM Card

Frederick Jerome·
Guides and Tips

Today we’ll show you the easy way on how to fix the SIM card issues on Xiaomi Redmi Note 4. If you’ve got “No SIM card detected” error, but IMEI is fine, here’s a solution that might work for you. This was originally tested on latest Official Global Stable ROM, but might also work on other ROM versions.

Official Redmi Note 4 firmware: the latest MIUI 11 Recovery and Fastboot ROMs for all regions (2), direct from Xiaomi's servers with MD5.

→ Redmi Note 4 firmware download

How to fix SIM card issue on Redmi Note 4

  1. Enter engineering menu by typing *#*#3646633#*#*
  2. Select “Network Selecting”.
  3. And change to “SIM1 – GSM/WSDMA (auto)”

Now SIM card should be detected and working fine. You must have a working IMEI for this solution.

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Frederick Jerome
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49 Responses

  1. I have the problem that my new Redmi 4 Pro does not detect the SIM-card half of the time. I tried your solution. The code provided does not open the engineering menu. A slightly modified code does: *#*#646633#*#*. However, in the engineering menu I can only test the hardware. There is no button saying “Network Selecting” and also no button.offering the option to change to “SIM1 – GSM/WSDMA (auto)”. What can I do?

    Reply

    1. This guide was written for Redmi Note 4, if we find solution for Redmi 4 Pro we will post it here. We will also be very thankful if someone or maybe our readers have any ideas.

      Reply

          1. I have one! But I don’t have a solution 🙁
            I thought that maybe you have already found it…
            Peace!

  3. i purchased Mi Note 4 yesterday but suddnley sim slot 1 not working what can i do plz reply me fast

    Reply

  6. Hi, I have the same issue “No sim card detected” on my Redmi Pro, and I have try your method but still no luck , it says “invalid sub id, Please insert sim card”

    Reply

  7. I have an issue that my Redmi note 4 does show network for 4g sim and poor network to sim 2 what should I do

    Reply

  10. Same problem!
    Just got it after 3 months of waiting… SIM not detected and cant use the menu code because it does not open anything! Maybe someone knows how to access the menu some other way or maybe i need to do something first?

    Reply

  11. I just wanna know why the phone is showing no network in sim 2 where as it has maximum range when inserted in sim 1

    Reply

  12. I bought a new SIM and it works. I guess it was just that I had a quite old SIM before. Easy solution. I hope it helps somebody.

    Reply

  13. If I insert Tata DoCoMo SIM in any of the slot, may be SIM 1/2, it is not detecting and says “No Service”. Its a brand new SIM. Also if the same SIM is used on a different phone, the network is working completely fine. Kindly help!

    Reply

  14. Tata DoCoMo SIM in any of the slot either SIM 1 or SIM 2, is not detected [“No Service”]. Its a new SIM card. When the same SIM is used with a different phone, the network works fine.

    Please help!

    Reply

  16. Hi, I have Redmi note 1. My phone s not detecting my sim card. WHen I gave it for repair and the repairer put his sim, it worked. As soon as I turn on the wifi or data pack, it suddenly stops detecting the network. Please help!

    Reply

    1. You can try to enter engineering menu by typing *#*#3646633#*#* just like as a phone number.

      Reply

    2. Tell peoples that they must have root permision! And i have this some problem but when i typin network selection is empty place…0 option there

      Reply

  19. I can purchased new red mi 4 mobile, but it’s very bad working. Because it is no detect 2 sim. Please help me any one.

    Reply

  20. My mob is redmi 4 sim 1 is not working.alwys say is no service. Help me plz. What I do
    And sim 2 to is working fine

    Reply

  22. i ve found that you can enter a menu on REDMI 4 PRIME with
    *#*#4636#*#*
    This code can be used to get some interesting information about Xiaomi Redmi 4 Prime and battery. It shows following 4 menus on screen:
    * Phone information
    * Battery information
    * Battery history
    * Usage statistics
    In the first menu you can set the SIM1 and SIM2 to GSM/WSDMA or else…
    for me so far its working.

    Give it a try an let me know!

    i found this usefull also! http://mobilespecs.net/phone/codes/Xiaomi/Xiaomi_Redmi_4_Prime.html

    Reply

  23. Mobile 2 sim of note 4 not working after sometimes it goes out of network again reboot it works normally some minutes then it’s not working no indecates

    Reply

  24. In my mobile sim 2 is not showing. If I put one sim in 2nd slot without putting 2nd sim in 1st slot then it works but by putting both sim cards at a time sim 2 will not work, but 1 sim and memory card works but not 2 sim.
    Kindly help

    Reply

  25. I am using a xiaomi note 4 and since Tuesday it’s been saying no sim card. I am on a Telkom network I don’t know if that is also affecting it. Kindly help.

    Reply

  26. i bought red mi note 4 GB ram 64 GB internal memory., AIRTEL sim is not detecting, no service its showing. please some body help me

    Reply

    1. Same is happening to me. I need help too. My Airtel sim was working fine. It suddenly stopped working. It’s not detected in both the slots.

      Reply

  27. Redmi 4A .. SIM card not detected most of the times… Call gets disconnected very frequently.. Any solution ?

    Reply

  28. Ever sìnce I bought my redmi 4X september 21 the Sim sloth 2 has never detected any Sim, is this a problem with the phone itself or the OS… pls fix this for us if it’s something fixable but if not, let us knw so we can learn to live with it

    Reply

  30. Hi Frederick Jerome,
    I am Murthy from Vijayawada of Andhra Pradesh, India.
    Coming to the point….
    I have recently purchased a mobile of RN4, 4/64 variant for which SIMs will not work, but they show the carrier name in Settings ——>Sim cards & mobile networks and both IMEI numbers are also present.
    And on the task bar area also, they show “x” mark, the signal bars like water mark.
    Presently it shows NO SERVICE.
    3 days back, I have downgraded MIUI version from 10.2. to 8.2.1.0. Now the version is 8.2.1.0 and the android version is 6.0.1
    When I flashed the 8.2.1.0, it showed me the signals for sometime and then I have, fortunately, applied for bootloader unlock officially.
    Today, around an hour back, the set was OFFICIALLY UNLCOKED BOOTLOADER SUCCESSFULLY.
    Now,

    based on the situation, I am unable to find out the problem whether software or hardware.

    Please help me in this regard.

    Reply

  32. Redmi 4 features are good. after 7 or 8 months later, it started to give trouble to me. It shows sim 1 and sim 2 signals. when I tried to call a phone the signals are disappeared. After that they came again. But no use. When I consult a MI Technician he simply says change the mother board and its cost is only Rs. 5000. I decided not to buy any Xiaomi phones

    Reply

  33. I have this same issue on my redmi note 7, just got it last week and neither Sim slots work anymore any suggestions? I’ve tried everything stated above…

    Reply

  34. Hi I have a Redmi 4 phone and i am getting Sim card not detecting issue.
    It works for few mints and after that No signals in SIM.
    When same SIM tried in other mobile it works fine.
    Kindly tell how to resolve this issue. I tried multiple restart and network manual setting aswell. no luck

    Reply

  35. Hi I have a Redmi 4 phone and i am getting Sim card not detecting issue.
    It works for few mints and after that No signals in SIM.
    When same SIM tried in other mobile it works fine.
    Kindly tell how to resolve this issue. I tried multiple restart and network manual setting aswell.

    Reply

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