Troubleshooting SIM Card not Found?
This Article Applies to:
All 4G LTE Routers
Issue Description/Phenomenon:
Customers may find that the SIM Card Status displays a 'NO SIM card detected' error (pictures as below) when they inserted the SIM card into the 4G router, follow these steps:
Troubleshooting Suggestions:
- Make sure the SIM card is firmly inserted per link: How do I install a SIM card for my 4G Wi-Fi router or Mobile Wi-Fi?
Some key points: Please pay close attention to the SIM card as the metal clamp that "secures it" closes and see if the act of closing pushes the SIM Card out of alignment.
For more details, please refer to the information shared by#36 @string
- Restart the router with the SIM card inserted.
- Reset the router by pressing and holding the RESET pinhole for 10s until all LED lights flash off then back on.
- Put the sim card into a smartphone, confirm that it is working well on the phone.
- Try using another SIM card if that is possible.
If none of the above helps to make the SIM card detect correctly, Please comment below with the following information:
- A picture of the bottom label with The model number and hardware version of your 3/4G Gateway:
(Especially you have Archer MR400 V4.2, Archer MR200 v5.2, TL-MR6400 v5.2, and TL-MR100 v1.2, Thank you in advance. )
- The SIM card carrier:
- Would there be any damage to the Micro SIM Card Slot before, such as the SIM card being stuck in and not able to be taken out?
- How long have you had the device, and when did this issue start?
- Was there any firmware upgrade before no sim card was detected?
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Hi, do you mean your MR600 V1 doesn't detect the Smarty SIM card but still detect other SIM cards?
Please test the Smarty SIM on other 4G devices to see if it still works, if possible, please try a different Smarty SIM to see if it can be detected by MR600.
Also make sure the SIM card is inserted properly: How do I install a SIM card for my 4G Wi-Fi router or Mobile Wi-Fi?
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I used 3G before, it worked. After updating the device's firmware to the latest on the website(TL-MR6400(EU)_V5.30_1.5.0 Build 221121), the router does not connect to 3G. Error 1. Maybe it's a coincidence. I tried custom firmwares, other SIM cards - the result is the same. Now firmware is TL-MR6400(APAC)_V5.30_220506.
LTE mode works perfectly.
- The SIM card carrier: - Ucom, MTS (Armenia)
- Would there be any damage to the Micro SIM Card Slot before, such as the SIM card being stuck in and not able to be taken out? - No
- How long have you had the device, and when did this issue start? - From August 2023. Issues started from September.
- Was there any firmware upgrade before no sim card was detected? - Yes. See above.
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Hi, please verify the version of your MR6400 on the device label to see if it is EU or APAC version.
Besides, since LTE works fine, may I know why you have to use 3G? and if you insert the same SIM card into other 4G device or even smartphone at same location, will 3G still work fine?
And did you ever try factory reset the MR6400 by holding reset button for about 10s?
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@TP-Link Hi, Sorry just catching up with this. I actually handed back the router for a refund as all the advice I got did not lead to any resolution of the issue. I'm just interested to know if TP Link & Smarty have resolved this? Dom.
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Hi, please verify the version of your MR6400 on the device label to see if it is EU or APAC version.
TL-MR6400(APAC) Ver.5.30
Besides, since LTE works fine, may I know why you have to use 3G? and if you insert the same SIM card into other 4G device or even smartphone at same location, will 3G still work fine?
The 4G signal is very weak, but 3G provides more speed than 4G with low signal level. Yes, when I insert the SIM card into another device, there is a 3G signal.
And did you ever try factory reset the MR6400 by holding reset button for about 10s?
Yes I tried, but it doesn't help.
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