Before troubleshooting further, confirm that you have an active plan, available data and that your mobile data is activated.
2. iOS Configuration:
If you're still encountering issues, follow these steps to check your APN settings on your iOS device:
Open your “Settings” app, typically represented by a gear icon.
Locate and tap on "Cellular".
Select "Cellular Data".
Choose "Carrier Services".
Click on "Access Points".
In the “Access Points” section, enter the following information: internet.oxio.com
Leave the “Username” and “Password” fields blank.
Once these steps are completed, you should be able to access the internet on your device."