Horrible experience. I signed up for a free trial where I was supposedly able to call worldwide. I spent over an hour trying to make a call to Canada and it kept failing and telling me the number was invalid, even though I know it is not since the number is stated on the government of Canada website. Viber then told me that I didn't have the right plan and I needed to purchase the Canada specific subscription (though the free trial said it included calls to Canada). I purchased it because the call I needed to make was time-sensitive and the calls still wouldn't go through. It then tried to sell me another unlimited package. Would not recommend at all - try using Skype or another service with more reliable support.
