I have tested the app for a while now. Other apps like csipsimple or bria has have better audio quality
Excellent app. The best among 20 softphones tested in a period of 6 years, although on the expensive side. Push notifications work perfectly on both iOS and Android. By far the best Bluetooth support around. Highly customizable with nice new interface and better settings. However latest update makes it impossible to switch off vibration on ringing even when general setting is off on android 6.0.1. On android 7.0 I had to set vibration intensity to zero in order to get around this problem. Also when the app is closed it also exits and so no incoming calls may be received. Bugs that need to be fixed. Still gets 5 stars easily.
After to many hours trying and reviewing all the major sip apps, i've found this to be my 2nd equal sip phone app, Test phone is a Zenfone 3 running Android 7. Two accounts registered, used in a small business environment, interface is one of the best, good call quality, reliable but in priority order if it wants t be the best. 1] ringtone is timing out, i think it's not looping back to the start of tone 2] be able to switch off missed call notification. Now what i have found that makes this app work on the Zenfone 3, switch off battery optimization in settings for this app makes it reliable, even when using push. to switch off the video function on the call screen, move all the video codecs into disabled, to get the proximity sensor to work, check remember audio route in sound settings, and on the dialer screen when making a call choose receiver by pressing on the speaker image on the left side, no matter what app you use, make sure your codecs match you provider / pbx, this makes a huge difference to call quality, review updated 9/5/17
Does not offer a intuitive way to look up a contact, unlike my phone's default phone app and many free SIP apps. Does not integrate with the phone's normal phone functionality, like 3CX for example.
Gr8 job The best app period. Gr8 job! Especially the push notifications. Dont understand why I cant chose my own ringtone & theme. Seems pretty standard on other apps. But its cool. This app rocks! Request: Since there is push notifications, can there be an option to close the app after a call. Don't really need it to stay open. Wish it could also switch from Wi-Fi to Lte without disconnecting and vice versa.
The push notifications work well and this is the make-or-break feature of this particular softphone client. I'd be giving it a five star rating if SIP handover was implemented, like other products on the App Store - such as Grandstream Wave. For now, when moving between Wifi and mobile data networks, ongoing SIP calls are dropped. This handover mobility is the one missing feature that would make this a truly brilliant mobile SIP client.
Groundwire 5.0 is a major update which brings a completely reworked, modern user interface.
Linphone is an open source internet SIP phone or Voice Over IP phone (VoIP).
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