Nonoh.net does not charge 5c per call as per the earlier thread. I use it and all calls are free. All betamax Sip sevices point to the same server and although I registered myself to sip, nonoh accounts are blocked. Also beware as
VoipWise | Free Calls give free calls to countries like Turkey and allow for SIP, but charge for the sip calls. This information is on the website, but could be easily missed. I've happily used nonoh.net, internetcalls.com, voipbuster.com and voipcheap.co.uk over the last 2 years without problems.