More and more people are using smartphones thanks to budget friendly mid-rangers, almost anyone can now afford to buy a smartphone.
Mobile payment is becoming more common and it is an opportunity to acquaint people more into using bitcoin . Mobile payment will eventually replace credit cards or at least will make them less mainstream. An example of this is Apple Pay. Bitcoin smartphone wallet apps are to use when you have a transaction, you just scan a qr code and the transaction is done though will take some time to be confirmed.
You say midrangers. But not even. Even low end phones these days sre much better then tip end stuff you got years ago so anyone rich or poor can meet online and use apps and we sites and forums. Right now I could be typing from a crappy phone or a really nice pc. You never know.