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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@TP-Link -
I will try one last time to explain the fix I suggested. Being subscribed to the thread (at the moment) I don't want, through inaction, to deprive people of fixing this thing.
But first, like any engineer, I know that there is rarely a single cause of a problem nor is there a single solution for it; but at least I can make my suggestion as clear as it can be. So I'm not in any way dismissing other solutions mentioned here for other causes.
Repeating some of what I wrote before, and adding a bit;
Noticing that the SIM card when in place was somewhat loose and not held firmly against its seating, I reinstalled the SIM Card with a small cutout from a discarded SIM and placed on top of the metal restraint on the SIM Card.The size of the cutout was sufficient to press on the SIM Card but not so large as to hang up on any adapter (my proof of concept approach was to use a folded-up piece of paper but the cutout was easier to use). The battery then pushed it more firmly down when I put the thing together again.
In doing that you have to watch the closure very carefully indeed because on my device, the metal clasp,in closing, pushed the sim card way out of position so there was no way it could make contact. So watch the SIM card and the clamp (repeat and the clamp) until the very last moment when you can't see it anymore. DON'T BE RUSHED OR CASUAL ABOUT IT.
Another observation to share - I initially got these errors when I trial-ran the mifi before I went off on holiday and for that used a temporary SIM which I planned to replace later. When I'd sussed out how to work the mifi and sorted the NO SIM Card issue and had travelled I put in the local SIM (Spanish HITS)..The first time I tried the latter I got the dreaded NO SIM Card message. But then I noticed that the SIM card was a very tight fit in the adapter and used a file small file on the sides of the SIM to get a good, even slightly loose, fit so that it would not be tilted one way or the other or be held up so that good contact was not achieved. From then on it has worked with no problems, over literally dozens of on/off cycles of the mifi.
I'm not fully recommending (*) that you do the following, at least not in extreme, but it stands to reason that the location of the SIM Card on the mifi contacts is not that dritical; there is plenty of room for a small misllignment, but the SIM contacts MUST touch the mifi contacts. So having a slightly loose fit of the SIM card in the adapter would probably work just as well or better than trying to be painfully precise. But remember even then to monitor the metal clasp against it pushing the whole caboodle way out of position.
One last thing --- you will find that having a small plastic pointer (like a small pencil-sized knitting needle) is useful to hold things in place while the clamp is closing or to check to see it the SIM card moves a tiny bit if you want to have a loose fit.
If anyone tries this and it works, please report it here to encourage any folks that are still stumped..
All the best and Merry Christmas
(*) that means that if you go too far in filing SIM Cards or whatever I don't recommend it and it's all your fault!
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Hi
We have 6 routers MR400. This is the second router happened.
router was working well next day doesn't detect sim.
we tried all solutions didn't workout. we have sent to local dealer.
We moved to DLINK DWR-960 works well and faster.
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Hi
We tried to install another sim is not detecting. and put another plastic cover for the sim and put a tape
Nothing is working
This is the second router happens
We have sent it to local distributor waiting for result.
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MTN GHANA
There was no damage to the SIM card /slot
I Noticed right after purchase
And there was no firmware upgrade done too
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Hi, Have you tried different SIM cards?
Would a reboot/reset make any difference?
By the way, where did you purchase the modem?
(please leave me a private message for notification in case I missed your reply).
Thank you.
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verizon sim dont think theres damage. also got a new cudy, same issue . first cudy, its been 65 days, had two siim cards no problem.
third one it says detached with both old and new cudy, firm ware up to date
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Hi, May I know the model number of your device?
How about the hardware and firmware version of your router?
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Been using it for 18 months
Carrier: Jio India
Tried reset, new SIM etc.
Suddenly stopped recognising sim card.
No damage to cared slot.
No Firmware upgrade.
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