This article is applied in the following situation: When you connect to the 4G router's Wi-Fi, none of your device could get internet access.
Situation 1: SIM card cannot be detected
Possibility:
1. SIM card is not matched or destroyed.
2. SIM card slot's issue on router.
Troubleshooting:
1. Install SIM card properly and make sure it has a good contact with the SIM card slot.
2. Try another SIM card.
3. Power off your Cudy router, then remove the SIM card and clean the card with a soft cloth or rubber. Insert to the SIM slot in the correct direction. When the SIM card is pushed to the correct position, you will hear a sound of "Di Da". Power on your Cudy router and try again.
What can I do if Cudy LT500 prompts SIM Detached?
Situation 2: Internet status and Cellular are not connected
Possibility:
1. The 4G router’s default APN profile doesn’t match with the SIM card.
2. IMEI binding with particular device.
3. Network signal weak or LTE antennas destroyed.
4. The SIM card may owe the fee or do not have data.
5. SIM card’s supporting bands doesn’t match with Cudy 4G router.
Troubleshooting:
1. Contact your carrier to confirm the APN setting or insert the same SIM card into the phone and find APN from the phone.
Then log into the web management page of Cudy router and set the APN manually and change the Network mode to 4G only.
(General Settings->Cellular->APN)
2. Remove the IMEI binding with your carrier.
3. Relocate the router in a suitable place to get better 4G signal.
If you know the band of your SIM card can use, please enable "Band Select" and choose the exact Bands to get a good connection.
Note: If wrong Bands are selected, 4G connection will fail.
4. Insert the same SIM card into mobile phone.
5. Try a different SIM card especially from different carriers.
6. Please check with your carrier which network type and bands are supported by your SIM card, then compare it with the network type and bands supported by Cudy device. You could check specification of the Cudy device on our Official website, for example, here is the network type and bands supported by LT500:
7. Upgrade the firmware to the latest version.
Where to upgrade: Download Center
How to upgrade: How to upgrade firmware of Cudy Router?
If the SIM card is activated and could work on another device. Please contact support@cudy.com with what troubleshooting you have done and the information below.
a. A screenshot of the System Status page.
b. Your Carrier name and Data Plan name.
c. Go to Diagnostic Tools->Diagnosis, click on GO and save the bin. file.
d. Go to Diagnostic Tools->System Log->Download.
Situation 3: Internet status is not connected, Cellular is connected
Possibility:
The 4G router’s default APN profile doesn’t match with the SIM card.
Troubleshooting:
1. Contact your carrier to confirm the APN setting or insert the same SIM card into the phone and find APN from the phone.
Then log into the web management page of Cudy router and set the APN manually and change the Network mode to 4G only.
(General Settings->Cellular->APN)
2. Upgrade the firmware to the latest version.
Where to upgrade: Download Center
How to upgrade: How to upgrade firmware of Cudy Router?
If the SIM card is activated and could work on another device. Please contact support@cudy.com with what troubleshooting you have done and the information below.
a. A screenshot of the System Status page.
b. Your Carrier name and Data Plan name.
c. Go to Diagnostic Tools->Diagnosis, click on GO and save the bin. file.
d. Go to Diagnostic Tools->System Log->Download.
28 comments
The SIM is fully charged but the router does not work. We can’t get internet connection.
@Ricardo，
Estimado cliente:
Gracias por contactar con el equipo de soporte de Cudy.
Consulte este artículo en el sitio web para solucionar problemas.
https://www.cudy.com/blogs/faq/what-can-i-do-if-lt400s-speed-is-slow
“Hola, yo he conseguido que funcione el aparato y la conexión con mi dispositivo, pero va muy lento y se para, haciendo un Test de velocidad solo le llegan 4Mb cuando dice que daría unos 300”
Hola, yo he conseguido que funcione el aparato y la conexión con mi dispositivo, pero va muy lento y se para, haciendo un Test de velocidad solo le llegan 4Mb cuando dice que daría unos 300
@Dear Claudio,
I think the router is faulty, please contact the seller to request a warranty.
“Hi
the SIM card, after having worked very well, at a certain point no longer fits in its slot… it protrudes a couple of millimeters and this makes it impossible to function.
If I press it with a nail it works correctly, but as soon as I let go, the connection is interrupted.
It seems to be a problem with the spring mechanism that holds or releases the SIM.”
@Dear Santiago,
Thank you for contacting Cudy support team. Our technical support has sent you the solutions via email. Please check.
“Hello, I have a question. I have a Cudy with a fully charged SIM card, but when I connect to it, it doesn’t distribute anywhere and the light is blue.”