While not a huge issue, some tenants still do not own smartphones and this limits potential clients. 

This was before the smartphone and the tons of information that's available today. 

Most issues can be solved with a smartphone and email. 

Some people still prefer that, and with mobile banking it’s very easy to deposit from smart phone.

All you need is a cleaner, handyperson, and a smart phone.

If she didn't give her kids smartphones and was more proactive about her kids' use of social media, she wouldn't have anything to complain about.

@Jason Taliaferro to underline what @Austin Hair said, all you need to self-manage an STR remotely from anywhere in the country is a cleaner, a handy-person, and a smart phone.

Sellers are an old retired couple without computer, internet, smart phones, etc. and live in the boonies far away. 

If you have a smart phone that is two or less years old, it should be more than capable of handling 4k video.

, 2) anyone tried to use a "window A/C wifi controller" / "window A/C wifi adapter" that lets you control each of the window A/C units from your smartphone, so you can lock the A/C into a specific range, turn it off when the unit is empty, etc, etc?