I've tried to connect to over and over to change my ring delay, but it's just not successful. This new Samsung A10e is somewhat of a disappointment. It also fails to switch on WiFi calling. Not sure if these issues are related. I have a case number in progress. Hopefully at least the WFC will get resolved.
We ran into the same problem and called Cricket Support. They gave us the correct code to change the number of rings before going to Cricket Voicemail: *61*14432803015*11*XX# SEND where “XX” is the number of seconds, either 00, 05, 10, 15, 20, 25, or 30. It worked.