Some companies are considering releasing new smartphones with built-in hardware wallets, or, there are apps which you can install on your phone to store some cryptos there. Like this, for instance:
https://www.coindesk.com/huawei-to-offer-first-crypto-wallet-app-in-latest-smartphones/Using blockchain wallet app isn't safe, but you can transfer only your daily expenditures, so in case of stealing, or forgetting some important information you won't be losing that much. Maybe there will be something like TREZOR for smartphones.
This is an interesting topic, as we pay Bitcoin over my phone as an ATM card scanner for example. Will lead the trend when inventors of this type of business.
paying for something with a scanner on your phone is old news
here we are talking about specialized devices,created specifically to manage cryptos
they should have at minimum two intrinsic qualities:
1.be secure,not something that can be easily broken into or hacked
2.be specializing on cryptos only,without any(or many) other functions
so far,phones are dominating the market,since one of the human main needs is communication,well and entertainment
code scanners,wallets etc. come as an addition to the main functions of the phone or a device