There are a few reasons why a 5G phone might show a 4G signal.
The phone is not in an area with 5G coverage. 5G is still a relatively new technology, and it is not yet available everywhere. If you are in an area that does not have 5G coverage, your phone will automatically connect to the 4G network.
The phone is set to only use 4G. You can usually change the network settings on your phone to specify which networks it will connect to. If you have your phone set to only use 4G, it will never show a 5G signal, even if you are in an area with 5G coverage.
There is a problem with the phone's 5G modem. It is possible that there is a problem with the 5G modem in your phone. This can be caused by a software bug, a hardware defect, or interference from other devices. If you think there might be a problem with your phone's 5G modem, you can contact your carrier or the phone manufacturer for help.
To check if your phone is connected to 5G, you can usually look at the signal strength indicator on your phone's status bar. If the indicator shows a 5G symbol, then your phone is connected to the 5G network. If the indicator shows a 4G symbol, then your phone is connected to the 4G network.
You can also check your phone's network settings to see which network it is connected to. If you are still having trouble connecting to 5G, you can try the following:
Restart your phone;
Check for software updates;
Contact your carrier for help;
Install a 5G signal booster if the 5G signal weak, so that to improve the connection.
Here are some signs that you may need a 5G signal booster:
You have trouble making or receiving calls;
Your data speeds are slow;
You experience dropped calls or call failures;
You have trouble streaming videos or audio.
If you are experiencing any of these problems, a 5G signal booster may help improve your signal and give you a better connection.