revvll 5G - Network Connectivity Problems; Internet Connection Issues; SIM Card Errors; Call Issues

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• When abroad, check that the voltage input is compatible.
• Check that the charging port is secured or it’s not damaged.
My phone can't connect to a network or "No service" is displayed
• Try connecting to the network by moving to another physical location.
• Verify the network coverage in your current area.
• Check that your SIM card is valid.
• Make sure your phone’s setting is not in airplane mode.
• If you are away from your T-Mobile's network, you may need to enable roaming in the phone’s settings
to connect to other network. Roaming charges may apply.
My phone can't connect to the internet
• Make sure that Cellular Data internet service is available in your wireless service plan.
• Check your phone's settings. Make sure Cellular Data is enabled or Wi-Fi connected.
• Make sure that you are in a place with network coverage for cellular data or Wi-Fi internet connection.
• Try connecting at a later time or another location.
Invalid SIM card
• Make sure that the SIM card has been correctly inserted (see "Inserting Nano SIM card").
• Make sure that the chip on your SIM card is not damaged.
• Make sure that the service of your SIM card matches the network you’re on.
My phone can't make outgoing calls
• Make sure that you have dialed a valid number and have touched Call on your phone.
• For international calls, check the country and area codes.
• Make sure that your phone is connected to a network, and the network is not overloaded or
unavailable.
• Check your subscription status.
• Make sure that you have not barred outgoing calls.