Since yesterday Zoiper won't register my account when on mobile data. I haven't done any changes to anything whatsoever, it just stopped registering. I'm with LG G2 phone. On wi-fi everything works fine, but that means that every time I go out I'll be losing business. I checked with my mobile data provider and my voip service provider, but the problem is not with them. It's the app. I tried reinstalling, read various questions and answers, tried everything suggested for similar problems, tried resetting the STUN, checked the ports, checked everything, but no success. Please help me solve the problem as I like the app and I don't want to give up on it just yet, but all this is very frustrating.