Siphone Android Edition is an award-winning SIP-based softphone – based on the market leading CounterPath Bria softphone.

****The Siphone client requires activation via your service provider. Without service activation the client will not work****

Highlights
• Highly secure, SIP-based softphone with exceptional voice quality
• Premium Features like Video Calls, Presence and Messaging enhance your mobile softphone experience
• Multi-tasking support for background operation, such as fielding incoming calls while using other applications

Telephony Features
• Contact List and Contact Favorites leveraging the device’s native contact directory
• Call display and voicemail indicator
• Speakerphone, mute and hold functions
• Call history with a list of received, missed and dialed calls
• Call recording
• Multiple call support – swap between two active calls, merge and split calls, transfer calls (attended & unattended)
• Audio codecs include G.711a/u, G.722(HD), iLBC, GSM, G.729 and SILK
• Automatic codec selection to ensure optimal call quality
• Support for DTMF: the ability to enter numbers to use an auto attendant via RFC 2833, SIP INFO and in-band

Messaging and Presence (subject to VoIP Provider)
• Send and receive messages in real-time and see when contacts are available
• Connect with contacts on any SIP-compliant or chat platforms including GTalk and Facebook
• Enable your enterprise IP PBX account to send and receive IMs with colleagues

Video Calls
• Uses the forward or rear-facing camera
• Picture-in-picture view lets you see how you look to the person you’re calling
• H.264 and VP8 codec

*IMPORTANT: VOIP OVER 3G NOTICE*
Some mobile network operators may prohibit or restrict the use of VoIP functionality over their network and may also impose additional fees, or other charges in connection with VoIP. You agree to learn and abide by your cellular carrier's network restrictions. Siphon Networks will not be held liable for any charges, fees or liability imposed by your carrier for use of VoIP over 3G.

Recent changes:
New features:
XMPP File Transfer
Audible alert when network connection is lost
Silence the ringer for incoming calls

Overall stability has been improved.

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Google Play Rankings

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Permissions

Development tools

test access to protected storage, read sensitive log data

Your personal information

read your contacts, modify your contacts

Services that cost you money

directly call phone numbers

Network communication

view network connections, view Wi-Fi connections, pair with Bluetooth devices, full network access, receive data from Internet

Your accounts

find accounts on the device

Storage

modify or delete the contents of your USB storage

Phone calls

read phone status and identity

Hardware controls

take pictures and videos, change your audio settings, record audio, control vibration

System tools

access Bluetooth settings, send sticky broadcast, connect and disconnect from Wi-Fi, disable your screen lock, expand/collapse status bar, retrieve running apps, run at startup, draw over other apps, prevent phone from sleeping, modify system settings

Extra

android.permission.ACCESS_NOTIFICATION_POLICY, android.permission.FOREGROUND_SERVICE, android.permission.INTERACT_ACROSS_USERS_FULL, android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS, android.permission.USE_FINGERPRINT, com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE