When I was younger there wasn't Internet banking, which brought fraud, so it's useful to have that at hand.
Online shopping, which includes price checking and c&c, tracking parcels etc.
Mobile phone tickets, bus apps.
As said there were more phone boxes and you could phone them back, so the call only cost 20p.
People also got away with more anti social behaviour. CCTV has helped, but so have people being able to record and take pictures.
Schools expected less, we did PE in vest and knickers, no one really bothered about permission slips and if you had an injury lying in the Nurse's room with a wet paper towel on your head, sorted you out.
So there was no need to contact Mum.
There wasn't the services, people still went into care homes, who now will be cared for at home, or they'd have died.
We didn't have global news, you only had the perspective of the paper that you bought. Which limited us.
You were surrounded by people who you could ask questions of, other Mum's etc. But now we have Google and forums. If you didn't fit in with those people you'd be isolated, now we have online communities.
I'd argue that we do need mobiles more than a lot of kitchen gadgets we now have.