The phrase "to own a smartphone" means to have or possess a mobile device that can perform various functions like making calls, texting, accessing the internet, and running apps. Full definition
It's the record number of smartphones in use, communicating about all the other records. (skadate.com)
The problem is that many apps were obviously designed with smartphones in mind. (laptopmag.com)
One of the benefits of this technology is that it is almost purpose - designed for use on smartphones with an all - screen or «infinity» display. (androidheadlines.com)