@Kayla15 

Hi, thanks for posting question here.

There could be several reasons why you are not able to access the internet or receive a signal with your 4G Mobile Wi-Fi. Here are a few troubleshooting steps you can try:

    1. Ensure that your SIM card works fine on other 4G devices and you are within the coverage area of your mobile service provider. Weak signal reception can result in poor internet connection or no connection at all.

    2. Make sure your SIM card has been detected by the 4G Mobile Wi-Fi and not locked by PIN code.

       If the SIM card is not detected, follow this guide for troubleshooting.

       If it shows "PIN Required", go to Advanced -> Dial-up -> PIN Management to enter PIN code of your SIM card to unlock it.

    3. Verify APN profile settings: Check if the Access Point Name (APN) settings on Advanced -> Dial-up -> Dial-up Settings page are correct. If not, try other available profile or create a new profile manually.

    4. Restart or factory reset the 4G Mobile Wi-Fi. Keep in mind that this will erase any customized settings, so make sure to note them down before resetting.

For more troubleshooting guides, please refer to these FAQ1 and FAQ2.

If You're using the device in other countries, you need to enable Data Roaming on the Mobile Wi-Fi device:

    1. Log into the Web UI via http://tplinkwifi.net

    2. Go to Advanced -> Dial-up -> Dial-up Settings, and enable "Data Roaming".

For more details, please refer to the FAQ.