Tried their service in 3 different countries and no kind of internet access is good enough for their voip service, while 2 other companies i tried worked fine except one case when i really had bad connection. Their ios app which use call back method (supposed to work better) didn't work at all!
They claim to provide service but i wonder if customer needs to lay their own fiber to sonetel datacenter to be able to get it.
Finally ditched them in favor of another company and realized how terrible experience it was. Just look for another company that is more professional and does its job more seriously.
Review about: Sonetel Voip Service.
Reason of review: Bad quality.