I need a good app for my iphone that i can call people from?

So i have an iphone but my mom cut my service and sometimes i need to call people and i need a good app that doesn't require an actual phone number and that doesn't make me watch adds to get minutes! SOMEONE Please Help! & i talk for hours with people!

Viber, tango

Get kakaotalk! Or line. You could also use Kik for messaging.

Kakaotalk and line are free and I talk to my dad (who lives in korea and I live in the US) for hours!
100% free.

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