I strongly disagree with Muhammed12. i wouldnt blame him personally but his ignorance. as rightly pointed out by muhammed all these voip service are by single german company called Betamax. but this is being blocked by qtel quitely by not displaying the page its blocked. when we use a proxy we are able to access these sites, so its qtel who are for sure blocking them. and theother voip you are talking about like skype costs five times and close to the qtel charge.
Moreover we cannot expect a reply from these voip provider as they dont seem to be professional as put up in many forums we could read. so there service is cheap in cost and so as professionaly.

anyways, I am not here to advocate or to defend, but to register my disagreement. thats it. cool.