When you talk to someone first on the phone, you automatically form a mental picture of what they look like.
Today’s invention is a simple game which allows both parties in such a exchange to choose, from a large number of faces fed to the screen,
a) which one they deem most like their current partner in conversation
b) which one they deem most like themselves.
The ‘winner’ would be the person who matched his a) to his opposite number’s b).
This is a potential ice-breaker which would not require anyone to upload any photos (but which might also enable that later).