For the last couple of days everytime I try to use my samsung mobile phone to make a call or check for voice messages I get a message telling ,me the network is busy. I live in the DE21 postal area in Derby, United Kingdom. Not sure what is going on here.
I'm really sorry that you're having these issues at home. I want to get this all sorted for you.
Are you able to try and use your sim in another phone to see if this helps? I know you only get the issue at home, but this is a very old handset that doesn't have some modern day smartphone diagnostics.