Before mobile phones people used landlines, in most case I'm sure they could do the same, maybe I should have phrased it as a smartphone rather than just a mobile phone.
Certainly some of the things you mention are more expensive, but what about the things that are not, food in real terms is cheaper now than it was 20-30 years ago, so is clothing, consumer items, not necessarily essential but what people deem necessary, TV's, white goods, computers - all these things are much cheaper in real terms