Although the focus here is on free options, I'd be remiss if I didn't mention Burner, one of the most popular and versatile disposable-number apps.
It works on a credit system, allowing you to purchase anything from a "mini burner" (good for 20 voice minutes, 60 text messages and 14 days of operation) to a full-blown premium subscription (.99 per month) that gives you unlimited everything.
Whats App exploded in popularity several years ago by replicating SMS as standard data for smartphones, bypassing the need to pay mobile network operators a premium for text messages.Turns out you can, and it won't even cost you anything.(Or, at least, it won't cost you much.) Below I've rounded up four apps/services that add a second line without needing a second phone.Relatively easy to use, but you need to also install an encryption protocol called Off-the-Record (OTR) to encrypt messages. siacs eu End-to-end encryption means your message is scrambled when it leaves your computer or mobile phone, and it stays that way until it reaches the person with whom you are communicating.You also need to have a pre-existing chat account with another provider. This prevents others - your service provider, for example - from being able to read the content of the message you send and receive.was limited to Vo IP calls between Viber users, but now it offers all the important features a good Vo IP service should have, like ability to call landline/mobile numbers and multiplatform support, etc.