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Acrobits Groundwire

Designed from the ground up with the mobile user in mind, Groundwire is the first mobile SIP Client capable of replacing your desktop phone.  Combining all the features business users need (see below) with intuitive features created with the mobile user specifically in mind (number rewriting, address book matching and more), Groundwire will quickly have you wondering how you survived without it before.
Category Price Seller Device
Productivity $9.99 Acrobits iPhone, iPad, iPod

Check out the video tutorial and knowledgeable article at the links below.

For the list of providers and VoIP services tested with Groundwire, see

And check out for a side by side comparison of the most popular features of Acrobits Softphone and Groundwire.

*CallKit support!
*Push Notifications for long battery life
*Video Calling - H263, H264 and VP8 codecs
*Multi line
*Call conferencing
*Transfer and attended transfer
*Call waiting
*Voicemail Notification and programmable Voicemail dialer
*ZRTP support (through in app purchase), the latest in secure calling for SIP
*enterprise support for SMS through SIP SIMPLE
*SMS support for betamax providers, pennytel and sipme
*backgrounding support
*Call recording (only available for SIP calls, will not record calls from your GSM line)
*Bluetooth headset support (iPhones, iPad 2+ and iPod Touch 4+ only)
*Customizable ringtones
*Quickdial, your favorite contacts only one tap away
*Number rewriting, edit your existing contacts for SIP dialing without creating additional entries and program specific number to be dialed through specific accounts automatically
*in-call quality indicator, see network quality, packet loss and jitter
*Background noise suppression
*Quick import of accounts from major VoIP providers including sipgate, callcentric, voipcheap and many more.
*TLS support for encrypted SIP
*SIP Proxy Support, VPN Support (configure VPN in iOS settings)
*Excellent sound quality, supports OPUS, G.722, G.711, iLBC and GSM.  Make an in app purchase to add G.729 for great performance over 3G networks
*SIP Log for troubleshooting

Groundwire fans, please rate Groundwire or leave a review.  

If you have an issue with Groundwire, please contact our support even if you leave a review stating the problem.  We are unable to respond to reviews so even if your issue is simple to resolve, we have no way of letting you know.  Groundwire is highly configurable so problems that seem insurmountable may just require a couple of adjustments to the settings.    


SIP - Groundwire is a SIP Client, not a VoIP service. You must have service with a VoIP provider or PBX that supports use on a standard SIP client to use it.

VoIP over 3G - Be aware that some mobile network operators prohibit or restrict the use of VoIP 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.


Fantastic Softphone Client

Groundwire offers more customization than any other mobile soft phone client while delivering and exceptional experience. Works great with our Netsapiens PBX.

The best iOS softphone app available, by far!

I’m so glad to have finally found a reliable iOS SIP client that delivers everything it promises. I use Groundwire with; registration is consistently maintained even when the app is closed (thanks to a well-implemented push mechanism that ACTUALLY WORKS!), and I’ve yet to encounter any missed or dropped calls. Buy it, right now. It’s worth every penny.

Could you just make it look right on a ipad? This is a beautiful missing just one feature.

Could you just make it look right on a ipad? This is a beautiful missing just one feature. Please. Dont make me beg Acrobits. It is humiliating.

No text

The app is ok but gets rated down as there is no text feature

Audio quality issues and speakerphone echo

Latest update has killed my audio quality. And I’ve never been able to use the speakerphone due to a terrible echo issue (even on mute) but at least I used to be able to hear my callers.

Still no iPad adaptation!

Subject says it all! iPad makes a great desk phone and speaker phone, particularly with a BT headset.


Why no love for the iPad? I would be nice if the app would at least rotate. Long time user - waiting a long time for a real iPad app.

It TAUGHT me to love Voip! Give it a minute!

I given this 5 stars because it is feature rich and saves me $25 bucks each month off Ring Central. Yes. That’s right. I use alliance phone as my voip provider (GROUND WIRE isn’t a stand-alone) and Alliance hasn’t yet made their own mobile app.. but with GROUNDWIRE (which is a 1 time payment...and can be purchased on android, as well), I have all the features that I pay for! (I also tried and like Bria but it has less customization, I found, and is a per-month subscription. Also, voice is not improved in Bria that I can tell). Transfer calls on the go! ... I MUST be able to transfer! (That’s one feature of many they get right) Thank GROUNDWIRE. Ps. I also like their system vrs Bria ...for how the transfer button is RIGHT in GROUNDWIRE. I ALSO get to have a system that I know works well/quickly for preconfigured transfer numbers to unlimited pre-saved offices. My GROUNDWIRE app does this VERY well, with amazing attention to detail. If I swipe down while on “Favorites” it switches to a typical scrolling contact view, with optional pic/info banner.... I use it for address of our locations and the picture is the location state... Add more favorites by long pressing anywhere! (I just wish there was an easy way to save from here to contacts. (Did I miss it?)...maybe put into contacts first, then add in their awesome favorites panel) If I swipe up again, it goes to these cute little “bubbles”/pic and banner only. I LOVE IT I also like how easy it is to disable an account with just a tap in settings. With all the features in this, I’m not sure why it isn’t a 5 star app ., You shouldknow I bought the additional $10 better voice protocal ...and that set up from my voip provider only took so long because I didn’t understand how. I was new to voip. (Just know that your voip username is PROBABLY a 3 digit extension number, your password will be obtained from signing onto your voip provider homepage/your account... and an email from your provider will have the rest... also check out settings carefully since you will basically be able to figure out the customization on you own or with a quick google search) NOTES on voip providers: consider what you need. I work for a call center. And, currently Unreal MObile doesnt share out voip info so it can’t be used in an awesome app like GROUNDWIRE> but Alliance phones has all the features included for $43


Does the job well and I find it quite reliable for several years now

Horrible New Interface

The new interface is horrible you can now only see 6 calls in the history at once compared to 14 before everything is way to spaced out and the font is way too big and now everything is capitalized. They still did not fix the tab bar either why are there lines on the top and bottom of it no other app does this.

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