The mobile phone receives the message. There is no internet at the front desk.

Just like you play games on your mobile phone, you will be disconnected. Sending text messages and making phone calls are not using 4G network, so you need to switch to 3G or 2G (different operators switch in different ways). Because the network type is switched at this time, the network will be disconnected.

To solve this problem is very simple, you can solve this problem by opening the VoLTE call. After turning on the VoLTE calling function, you can make phone calls, send and receive messages and play games at the same time in the 4G network.