iSip -VOIP Sip Phone App Reviews

All is good accept calling from iphone contacts. for some contacts it is not correct number transferred to iSip (usually next to that was pressed, or nothing if there is only one number in the contact)

On iPad mini 2 with iOS 7.0.4 its even not possible to create sip account, Waste of money :-(

Its a pity it works only with wi-fi and not anywhere 3G connection is present.

I tried to make it work with my Poivy account, it did work for a couple of days and now it says that my Poivy account is active, all is well, but when I call a number it says "call" and it never calls... Money thrown away.

How useful an app like this that wont accept any calls when in background! Just found out too late. The support didnt answer to my mail.

When my phone goes to sleep i cant receive the calls

I download new update for iOS 8 but crash app, when I push a dial crash not work :-(

I use this with Google Voice and Gizmo. I think it works well.

HORRIBLE HORRIBLE DOES NOT WORK DO NOT BUY!!!!!!

Tried to use in conjunction with Google/Voice and Gizmo5; however application crashed when incoming call answered. (?Push transition error?) Outgoing SIP calls worked fine. (iPad WiFi+3G). Additions: Support had me set VAD to on, this stopped the crashes.

I have used it for a couple of weeks. I set up my Voipon (UK) account and incoming and outgoing calls work perfect in both 3G or Wifi. When I receive a call, if the app is closed, I will receive a Push Notification, allowing me to take the call. Even when I am in the street connected by 3G. THAT IS GREAT! Support have answered promptly to me when requesting some information about the acc config. Some times, when 3G is not very good the quality of the voice decrease. (Its logic). The Developer needs to keep working on the UI (I think is very poor) and also the ring tones options. Other than that, for the moment the best Voip App I have tried.

Downloaded 5 "SIP compatible apps" only to have iSip & WeePhone work with our internal Asterisk PBX. This app has decent call quality and has by far the best user interface of the apps that worked. I can now make phone calls from the bottom floor of our building that has no AT&T reception but excellent WiFi coverage. Save your self the cash of testing 5 apps and just purchase iSip.

When I am using it with Google Voice/Gizmo5, it looks like it answers in the application, but the phone calling just keeps ringing all the way to voicemail even if I hang it up in the app.

The call button dose not work at all I got this app thinking I could call people since I do not have a cell phone this was a waste of 5.99 dollars DO NOT GET this app

IMO - Support DTMF tone (RFC2833/Inband) during the call is still not working when the VPN is running :( ... wish they could work out that one single bug.. does work when VPN is off..

I downloaded iSip and it didnt work properly; Audio was so choppy that it couldnt be used (even on the same network than our Asterisk Server). Also under some conditions and I only got one way audio. I spent a complete day doing several adjustments and debugging the protocol to check what was happening. The application is now working fine (audio is good; Not excellent, but good enough). If you are planning to use this application; You must have really good understanding of VOIP and what is happening under the hood. For example; I am not a big fan of iSIP VAD implementation, I had to turn it off. Remember to set the stun servers if you are planning to use it behind a NAT; there are a few free stun servers on the internet. PUSH did work OK to me; although I cant answer the call when receiving the notification. IMHO there is room for improvement on this app. Buy it *ONLY* if you really know SIP protocol and you are willing to spend some time to configure/debug it to make it work correctly on your enviroment. *** Please add g729 support ***

Push works reliably, and call connection for pushed incoming calls is the fastest among similar products. Excellent job! Customer support is also very responsive and very knowledgeable. Used my broadvoice account with this app, worked great!

I have Ios 4.0 on my iPhone but Voip calls could not be received once application closed....!

Does not receive SIP calls while app is in background except through push. Despite the claim that its updated for OS4. Only feature improvement is its not reinitializing when you put it in the background so its fast to make a call... not the desired functionality.

This is the developer, IOS4 does not support UDP running in the background. So we still use the push notification service to receive the incoming calls in the background. With the selection of our public push server or your local private push server (if your sip server cant be reached by our public push server), you should have no problem to receive the calls when the app is in the background. You can download the private push server vmware image from our website. Just make sure you have set up the virtual servers interface to bridge mode, so your isip can talk with the virtual server. The IOS4 support gives you the possibility of doing VOIP calls in the background and do other work in foreground. You can also go back and continue VOIP calls after the VOIP call is interrupted by cell calls.