Zoiper IAX SIP VOIP Softphone1.18.5

Zoiper is a FREE IAX and SIP softphone application for voip calls over 3G or WiFi.
Zoiper softphone offers a simple user interface and superb audio quality for smooth Voice over IP experience.
WARNING: Please use only versions from the appstore, we have reasons to believe some of the (russian) .apk files floating on the web contain a trojan that might steal username and password and make fraudulent calls. The official zoiper from google play is safe to use. If you want all features without paying, don’t pirate it but ask your friends for the unlocking cheatcode instead. First rule about the gold club: don’t publicly publish the cheatcode, but share it privately at will.
Contact us for whitelabel versions with your logo and company or for our VoiP SD if you want to build your own solution or visit : zoiper.com/en/voip-sdk
Available for both SIP and IAX systems, Zoiper is a phone solution perfectly fit for end users, service providers, call centers or any business willing to benefit from VoIP communications.
Want to distribute it to your users ? Use the free automatic provisioning system on : oem.zoiper.com and avoid tedious manual configurations!.

Zoiper softphone is a standalone client-side software VOIP phone application and is not bundled together with a voip service. To make and receive voip calls using Zoiper, you must subscribe to any SIP or IAX based service provider across the globe.
Zoipers key features include:
Bluetooth support (beta)
Lowest battery usage with highest reliability / stability on google play
Lowest latency of all android softphones
Excellent audio quality, even on older devices
Supports calling over 3G and WIFI
Multiprotocol with SIP and IAX support, compatible with all RFC
compliant PBXs
Background / multitasking support
Native dialer integration
Integration with the native android contact list
Speakerphone mute and hold
UDP and TCP transports (use TCP for better battery life!)
Supports g711 (ulaw, alaw), speex, iLBC and gsm codecs
Supports sending of DTMF
DNS SRV
Built-in echo cancellation
STUN support
Change ringtone per account
call waiting
Video support (gold users only)
ZRTP / TLS support (gold users only)
Call Transfer (gold users only)
Wideband audio (gold users only)
Zoiper is also available as customized branding solutions or VoIP SD=.
Phones that are unstable because they have broken audio implementations:
Alcatel one touch series (poor audio drivers cause system freezes and crashes)
HTC one m8 (causes freezes.)
We tried to contact both alcatel and HTC to help them fix the issue, they didn’t bother to reply. If you can help, let us know.
Warning: using Zoiper as a default dialer may interfere with dialing 911 emergency services.
If zoiper does not work with your phone, please contact us at support-zoiper.com and we will try to support your phone in future versions.