Possibly discontinued. App hasn't been updated since November 30, 2014.
SIP can be a tinkering game. Csipsimple enables advanced tinkering to perfection.
Please pick an ITSP offering SIP TCP
If you care about your dignity you encrypt. Ostel is guardian projects free encrypted sip platform.
Our users have written 2 comments and reviews about CSipSimple, and it has gotten 37 likes