O2

Does anybody know why call waiting doesn't notify me with a beep if it is an O2 number trying to call me, instead I get a text message from that person trying to call me saying I have had a missed call from them. Any other network number trying to ca...

i have a Samsung Galaxy S20 Plus & i keep getting messages from PsyToday, for some reason it doesn't allow me to block number, usually there are 3 little dots in the top right hand corner of the screen but not with these messages,the messages tell me...