Very good open-source SIP client CSipSimple and Sipdroid are both excellent. CSipSimple is probably heavier but has a slicker UI and a better integration with the OS. Didn't notice any major difference in terms of call quality. I've been using CSipSimple lately... **Update:** not sure the development is still active -1 star
Had issues with all other system and media volumes so uninstalled it. Reinstalled a little while later after not being able to get any others working and now it's not a problem.. however auto switching from wifi to cellular works 1 in 3 times and you have to check if it's running and start it then it works fine.
great free open source no ad voip app! Dear developers! 1)Please update the list of servers of voip.ms. 2) Also, it is easy to kill the app from the recent app list. The service (or what is it called in Android) keeps running. If you run csipsimple again, it won't register on your server. Would be nice if this was fixed. 3) echo cancellation doesn't work on voip.ms lately. The other party hears their own voice. This doesn't happen on Zoiper and others. Thank you!
I love it. I'm using this at home connected to my local Asterisk server using G 722 protocol over Wifi and it is wonderful. It is a brilliant piece of software thank you so much. Integration with the dialer in my Samsung S5 is perfect. Knocked a star, app crashes on Intel proc dell venue 8
Great app, would pay for it. Would also give 5 stars if some of the long-standing bugs were fixed. For example: the UI freezing when pressing some in-call on-screen buttons like speakerphone(on the SGS7 Edge for the last few Android updates).
Great for YouTube! As a YouTuber, I greatly needed and searched for a VoIP call recording app. Finally I've found this out of those countless, useless apps. I love it. Now I can make better videos since my friends can join me in them. 😃
* Hot fix for android 5.0
* New wizards
* intel x86 support (with new playstore requires to bundle in same application)
Linphone is an open source internet SIP phone or Voice Over IP phone (VoIP).