Random phone calls.

[robbiegal]

old news but the scammers remain much the same
my son in law has a ball with them and records the conversations
quite often they hang up on him which is great get back

"Besides stinging you for a fee, they can upload software that can capture sensitive data such as online banking details."  

http://www.mirror.co.uk/news/uk-news/microsoft-scam-call-conman-mohammed-3341579#ixzz35nx47LBM
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http://www.mirror.co.uk/news/uk-news/microsoft-scam-call-conman-mohammed-3341579

[runway]

None of my household never answer private or overseas numbers
Caller ID is well worth the small cost for landline