This app was mentioned in 3 comments, with an average of 0.67 upvotes
why stop at 1 number?
https://play.google.com/store/apps/details?id=me.dingtone.app.im
You can download DINGTONE is an app for android and ios. You can get phonenumbers and they will get atached to you account and you can use the numbers for calls and sms. They cost credits. You can buy the credits or get credits for free by playing games or watching ads.
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Another very good program you can use is VOIPBUSTER you can make free calls to the usa and canada. And you can also add phonenumbers you allready have to the voipbuster account. So what you can do is:
Download dingtone and get your phonenumber.
After that download voipbuster and add the phonenumber to your voipbuster account. So now you can use the phonenumber from dingtone to call for free instead of using dingtone credits.
voipbuster:
https://www.voipbuster.com/download
Dingtone anroid:
https://play.google.com/store/apps/details?id=me.dingtone.app.im&hl=nl
Dingtone IOS:
https://apps.apple.com/us/app/dingtone-wifi-calling-text/id588937297
Nice app! I got a free USA phone number to verify my PayPal account. Thanks Dingtone Android: https://play.google.com/store/apps/details?id=me.dingtone.app.im iOS: https://itunes.apple.com/us/app/dingtone-free-phone-calls/id588937297?mt=8