Hey @Samsung_ZEbgzXr ,
If you're having signal problems with calling you could trying turning on/off VoLTE and Wifi Calling.
If you're having signal problems at home you can try to request for a signal booster from your carrier.
You can install phone signal app. Then when you are where you want . Hold power and volume down button and it will screen shot it. I'm assuming you need this information for your cellphone carrier.