Linphone is an open source app offering free audio/video calls and text messaging. With Linphone, you can be reachable at any time, even if the app is closed, with a WiFi or 3G/4G internet connection. Contact Belledonne Communications www.belledonne-communications.com for any specific development query.

Linphone alternatives

Whistle Phone

Whistle Phone is an app for calling or texting your family and friends for free over Wifi or your mobile data plan. On your own customized phone number, you can make and receive unlimited texts from high-definition and secure calls to other Whistle users. * Check out Whistle Phone for the Mac on the Mac App Store *

Media5-fone SIP VoIP Softphone

IMPORTANT:Media5 Corporation announces the End-of-life (EOL) of the Media5-fone SoftClient on all platforms, including Media5-fone Free, Media5-fone Pro, and Media5-fone MPS, starting on August 31, 2018. Until then, support will be limited to fixing selected bugs and no new improvements or support on Operating System (OS) versions will be done. Please ask your mobile network operator before enabling the VoIP over 3G feature.

Monal - Free XMPP chat

Monal allows you to connect to your chat server without having to give a third party access to your password or messages. Whether it is a personal Google talk account or a corporate chat server, it is important not to give someone access to sensitive information. Implements XMPP certain extensions intended to improve mobile communication.- XEP-0280: Message Carbons keep messages in synch between clients.- XEP-0198: Stream Management to quickly reconnect.- XEP-0199: XMPP Ping to maintain connections.- XEP-0313: Message Archive Management to download chat history.- XEP-0352: Client State Indication for dramatic reduction on power use.- XEP-0363: HTTP File Upload to send images in conversations.

Grandstream Wave

Grandstream Wave -Video IOS 7.0SIPGrandstream Wave6624BLFPBXUCM6100UCM6510 IP PBXGrandstream WAVEDNDLDAP , 720P. G.711/aG.722 (HD-audio)G.726-32GSMiLBCOpus Speex SIP IOS 7.0 SIPTLS128/256SRTP 6SIP66 6 24BLF UCMLDAP NATNATSTUNUPnP xml 3.5mm IOS DND, DTMFIn audio, RFC2833, SIP INFOFail-over 2G3GWi-Fi 4G