Giving out your phone number is always a bit of a risk. If you give it to the wrong person, you could start getting harassing phone calls or sales calls at all hours.
Changing your phone number will take care of those problems, but that's such a hassle and you don't want to do it if you don't have to. That's what makes a disposable number so useful. You can give it out to strangers and then drop it if someone starts abusing it.
A great way to get disposable number is the Hushed app. To get started, simply download the free app to get one free number. If you want more numbers you can purchase them for as low as $1.99.
It's also a great choice if you'd like to have different numbers for work and personal use on the same phone. You're able to send text messages and receive voicemails with the app.
Warning: Don't even think about using the app to do something illegal. Just because spammers won't know who you really are, doesn't mean law enforcement can't figure it out. Some online criminals found that out the hard way when the FBI hacked into Tor secure network.
The disposable numbers also allow you avoid paying roaming charges when you're in a different country. You can get a local number for local calls, or make international calls through the app using your Wi-Fi connection or data plan.