hello, I have used Voipstunt on my XP desktop for a few years without problems and so installed the app on my iPad. It worked fine but now people I call are unable to hear me clearly due to what they describe as "weird musical sound". I have uninstalled and reinstalled but the problem still exists. I have tried to contact voipstunt but without success. Has anyone experienced or heard of this problem. Any assistance will be much appreciated or a contact address for voipstunt.