Re unwanted phone calls
Have you never heard of "Caller ID" or "Call Blocker" ? I have both .
All friends and contacts are stored in my phone's memory and their name will appear on the phone's screen so I know who is calling before I decide whether to pick up the phone. Any "unavailable" or "withheld" numbers go straight to "answerphone" where they are either blocked, or dealt with, if someone has left a genuine message. We are in the 21st Century and being polite on the phone to a "conman" (which is what a lot of them are) is not an option for me.
Some of the calls coming in from Asia and Africa (conmen) are now able to show their number as being from England ! In which case, if I do not recognise the number, I go online to "who-called.co.uk" where thousands of people have already commented on whether the call is dangerous, harrassing, Microsoft scam, oven-cleaning scam, Dyson scam, car accident scam, window-recycling scam +++
Some pre-recorded calls, say "press 9 " (or similar)if you wish your number to be deleted from their database. Do NOT take any notice of this, as pressing "9" or whatever number, will take you to a premiium-rated call .