Do you have app related questions?Ask the Appszoom team and get a personalized answer within 24hrs!X Close



1,000 - 5,000 downloads

Add this app to your lists
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.

Tags: groundwire apk, groundwire.apk, groundwire, groud wire apk, groundwire andrid apk, groundwire zrtp in app purchase contact support, g.729 annex a codec groundwire, acrobits zrtp apk, groundwire s.r.o, acrobits apk.

Recently changed in this version

NEW! Support for Push Notifications using Google Cloud Messaging!

With push notifications enabled, the app consumes very little power when in background and you can still receive incoming calls! This makes Groundwire the most battery-efficient SIP softphone for Android.

Android Push Notifications is a new, exciting feature. We'll be glad to hear about your experiences, positive or otherwise, at

Note: version 4.02 fixes a crash in contact detail page.

Comments and ratings for Groundwire
  • (54 stars)

    by David Briggs on 28/05/2014

    I'm a new user of Groundwire. I have it installed on a Galaxy S4 Mini, using Push Notifications. I'm using a Jabra Bluetooth headset. Now, when a call comes in, it doesn't ring on the headset. Similarly, if I hear the ring when the phone is in my pocket, I can't pick it up using the headset button. I have to open the phone and tap Accept. That's no use if I'm driving.

  • (54 stars)

    by SB Wong on 15/04/2014

    The microphone is not working I can hear but receiving party cannot hear me. It always hangs my phone. Don't waste your money.

  • (54 stars)

    by Eli Reisman on 18/03/2014

    This app beats Sipdroid and CSipSimple hands down.

  • (54 stars)

    by Rodney R on 17/03/2014

    Reliable app. Any chance to add video calling like IOS? Otherwise runs well on HTC Rezound (v 4.0.3).

  • (54 stars)

    by stanislav kozhuharov on 09/03/2014

    But you have to understand how to set up an account which is not predefined. Love the variety of options to configure. Developers, please add to the list of voip providers also BGOPEN. NET. thank you

  • (54 stars)

    by Mark Buse on 24/02/2014

    Groundwire nearly bricked a Google Nexus 7 and clobbered other apps that worked great before. We thought that Counterpath's Bria SIP soft phone was poorly designed until we worked on configuring several SIP accounts in the Groundwire app. There are too many different screens with settings squirreled away to get just one account working, and no diagnostics to find out why additional accounts will n

  • (54 stars)

    by Wonbin Cho on 17/02/2014

    I've been using Groundwire for some time, and am quite satisfied! Can you add the 'External Provosioning' feature like that of the iOS version? Of course, making other web services available will be very much appreciated!