A. 1. Check network settings: Go to your device's settings, select 'Network & Internet', and ensure that mobile data is enabled. You can also toggle Airplane mode on and off to reset your connection.
B. 2. Reset network settings: On your device, go to 'Settings', then 'System', and select 'Reset options'. Choose 'Reset Wi-Fi, mobile & Bluetooth'. This will reset all network settings and may resolve connectivity issues.