(1) Short answer: not a speech but try to make more that one point.
“It varies a lot – and it depends on how far “in the past” you mean. Lots of young people use Facebook – but my parents don’t. Everyone has a mobile – and they have for at least the last 10 years. Of course, 30 years ago – they didn’t.”
(2) If you have some nice collocations – use them!
“The mobile phone had a enormous impact on XXX society – everyone has and we can keep in touch -and text each other – at any time. That’s the single biggest change over the last 20 years.”
(3) You try:
In your country did people in the past keep in contact in the same ways as they do today?