The post explains that smartphone-based cryptocurrency wallets are a very safe place to store digital money, at least the equivalent of the amount we could store in our physical wallet. To save long-term cryptocurrencies, Samsung recommends creating multiple backups of the private key associated with the wallets.
The Smartphones producer commented that private keys should be stored offline to maximize their security, which means that they should not reside on a mobile phone or any device that connects to the internet regularly.
First Opera says people can store coins inside of their browser, then Samsung says smartphones are great for storing cryptos... There are some serious problems with this statement. The first problem is that while flash drivers don't usually break, so the wallet is probably safe if you make sure you know where it is, a smartphone can break by simply falling down to hard from a table. The second problem is that people lose their phones quite often. Surely if you stored your keys not on the phone, the wallet will probably not be accessed, you won't be able to get to your coins as well. Another issue is that it is weird to recommend storing coins on a smartphone that doesn't connect to the Internet regularly. Who on Earth would use a smartphone without the Internet?