Usb bt400 compatibility issues
Some SIM cards need to validate the PIN number by factory default. It is necessary for you to have a suited SIM and 3G/4G modem, and please make sure that you have installed your SIM into the 3G modem correctly. If you cannot access the Internet via the 3G/4G router, it may be caused by the following issues.Īnd if you are ensuring the 3G/4G modem is working properly when you plug directly to the PC/Laptop, you can skip (1)-(3), these three steps just to double check and analyze the reason. Now we are sure that your USB modem can be identified successfully by the 3G router, as you can see the following picture. If it is in the compatibility list and but the modem still cannot be identified by the 3G/4G router after all the troubleshooting, please plug your modem to the router then restart the router and wait for about 5-10min, then go to ( Advanced)>System Tools> System Log to save the log of the router and then send the log with some other related information such as the 3G/4G modem model, your country name and ISP to TP-Link support. It is an important step to check if this case caused by the compatible issue or the USB port issue on the TP-Link modem router. If possible, please do the comparison test and check if another 3G/4G modem could be identified by the TP-Link modem router. Please click here to download the latest firmware and then upgrade the firmware of your router.
USB BT400 COMPATIBILITY ISSUES HOW TO
How to reset TP-Link router to factory default
![usb bt400 compatibility issues usb bt400 compatibility issues](https://dlcdnimgs.asus.com/websites/global/products/a0Nb1FJVfaGqF0Zs/bluetooth.jpg)
Please refer to the instruction below to RESET the TP-Link modem router and identify again. We need to avoid the hardware detection issue, so please unplug the 3G/4G modem and check again.
![usb bt400 compatibility issues usb bt400 compatibility issues](https://i.pcmag.com/imagery/reviews/05ZHeguKubVzOcULrMfcrt8-2..v1569469940.jpg)
Unplug and plug the modem into the router again.Make sure the 3G/4G modem could work with a SIM card and provide the internet properly. Make sure the 3G/4G modem can access the internet when plugging directly into the computer or laptop.