Here are some quick steps to follow:
- Ensure your SIM is active and has available data credits. You can check your SIM balance including data credits on *131#
- Check the time and date on your device is correct
- For dual SIM phones, check the correct SIM is the default for Mobile Data
- Check the APN settings is set to internet
- Adjust the Network Mode (e.g., 4G, 5G) and check for signal strength
- Restart your mobile device