Problem in iOS7

Installed APP.. registered fine on our VOIP system
Made a test call.. No audio, Rebooted the phone, it worked for one call
Then lost audio.. The problem is made worse is that this app kills audio SYSTEM WIDE.. i lost my email, text notifications! WHen calling out on my cell number (Not voip) or receiving a call.. you can only hear yourself with static and echo.

Quitting the app is no help. I removed and rebooted.

System sounds and regular calling work again.

This is very a very intrusive bug.. I never used this app before so I only have iOS7 experience with it. as for now, dont use it.
I ended up buying yet another soft phone app… BRIA and it works fine and was cheaper. My VOIP provider suggested both of these so I will give Groudwire the benefit of the doubt that .. it used to work under other iOS versions… But, test your apps.. wasted 9.99

JimPapp about Groundwire: VoIP SIP Softphone, v2.5.1