(3 stars)


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1,000 - 5,000 downloads

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Groundwire, the leading Business SIP Client is now available on Android. Packed with all the features a business user needs, Groundwire makes taking your office line with you everywhere a breeze. Check out all these great features, with more coming soon.

•Push Notifications for incoming calls for improved battery life
•Call Conferencing
•Transfer and Attended Transfer
•Call Forwarding
•Bluetooth headset support
•Secure calling through SRTP (SDES)
•ZRTP support (through in app purchase), the latest in secure calling for SIP
•Support for use on wifi and 3G networks
•backgrounding support with status bar notification; check your email or other tasks while still available for calls on the Softphone
•GoogleVoice interface, originate and complete GoogleVoice calls all from one app (requires GoogleVoice account and SIP Account with incoming U.S. numbers)
•quick import of accounts from major VoIP Providers
•call recorder and player, seamlessly integrated into the call history
•Bluetooth headset support
•HD Wideband audio through G.722
•excellent sound quality, includes the G.711 (ulaw and alaw) and GSM audio codecs. Make an in app purchase to add G.729 Annex A for great quality over 3G networks
•TLS support for encrypted SIP
•audio codec manipulation, enabling you to prioritize the codecs used and disable ones you don’t want to use
•comfortable and super-smooth user interface, fine-tuned specially for Android
•easy, intuitive configuration
•simultaneous registration of multiple SIP accounts, have multiple accounts registered to receive incoming calls and switch the account used for outgoing calls without leaving the keypad
•Android contacts integration. Easy to call anyone in your contacts via SIP
•add new contacts directly from Groundwire
•ability to generate DTMF tones while in call, to control various PBX features or automated systems (use audio, rfc 2833 or SIP INFO)
•speakerphone support
•detailed call history
•configurable RTP port range
•SIP Proxy support
•STUN server support, automatic service discovery using DNS SRV queries
•phone number resolution. We present the phone numbers in a convenient format with grouped digits, display the flag and country name and even region/city name for some countries, including USA

The Android Market does not make paid apps available in all countries.  If you're unable to purchase Groundwire, please visit for an alternate method to download and install.

Groundwire is a SIP Client, not a VoIP provider. It needs to be used in conjunction with a VoIP provider that supports use on a SIP Client to work. Check out our list of verified VoIP operators at

VoIP over 3G - Be aware that some mobile network operators prohibit or restrict the use of VoIP (Voice over Internet Protocol) over their network. They may prohibit the use of VoIP or impose additional fees and/or charges when using VoIP over their network. By using Groundwire over 3G, you agree to abide by any restrictions your cellular carrier imposes and agree that Acrobits will not be held responsible for any charges, fees or liability imposed by your carrier for using Groundwire over their 3G network.

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Recently changed in this version

- Improvements in video quality
- several minor bug fixes and improvements

Comments and ratings for Groundwire
  • (54 stars)

    by Yannis Lianakis on 10/03/2015

    Please check the bt audio routing asap. On my Galaxy Note 2 + Samsung HM1500 it does not work any more.

  • (54 stars)

    by Ashwar Sadh on 23/11/2014

    Crashes, errors in connecting, buggy app, Ui doesnt feel Smooth.

  • (54 stars)

    by John Molyneux on 13/11/2014

    Not working since upgrading my phone to Lollipop, At least my Bria is still working

  • (54 stars)

    by Malcolm Andrews on 12/11/2014

    The latest version crashes when making a GSM call. Still no easy way to disable. Turning of push notifications does not stop incoming calls, have to uninstall to stop working. Hope it gets better in the future but at the moment it's not at it's best. Anyway I have uninstalled it for now and am looking for an alternative.

  • (54 stars)

    by Ali Almahdi on 28/10/2014

    Although handling outgoing calls is set to never, it still tries to handle native outgoing calls and force closes. It was a great app, fix this soon.

  • (54 stars)

    by Aaron Botti on 23/10/2014

    The phone works very well, as advertised. However even though it is not running it causes a error every time I use my mobile phone to make a call. Unfortunately once I'm connected on my mobile I cannot hangup or do anything else on my phone until I clear the error.

  • (54 stars)

    by Carl Chernih on 23/10/2014

    Works well on Samsung Galaxy Note II, Sony Xperia LT26i, Samsung Galaxy SIII, Samsung Galaxy Note 10.1, Sony Xperia Z1, but crashes on Samsung Galaxy SII Plus. As a notice to developers: in previous versions it was more comfortable to see if app fails to connect to SIP server (I mean green and red icons in Android status bar). It looks nice, but not clear to understand instantly if there is any pr

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