Have you ever got a new phone and in a week, you can't make calls? Well, I was faced with this situation yesterday afternoon and I kept thinking "Why me? Why my phone".
The last call I was able to place was through Viber. After that, I could not make any regular calls. I would press the call icon and then a blank screen would emerge and vanish like a typical bug. I tried it on different people ( as though that would be the issue!). Nothing. No indication of a call. I didn't like the look of it. I checked online and there were various solutions like get a new SIM card, change Wi-fi settings and I tried all that as well. All to no avail. Would I have to take my phone to a mobile shop? In between all this, it did occur to me that something had happened when I used Viber. I had given the option Always instead of Just Once just before the call was placed in a dreamy haze. Now I really did not know how to undo that. So I uninstalled Viber and tried to make a call and voila, me phone was back to normal!! And then I re - installed Viber and it still worked. Only this time, I gave the option as Just Once.
Now these are options, do you want to always place the call using Viber or do you want to make a call with it just once?
Because when you give the option Always, the default app settings change. And this is what happened to my phone. So I could not make calls using the regular mode. Now if you know how to change the default settings without uninstalling Viber, that's fine. Otherwise just uninstall, place a regular call and then re-install. And make sure you set the option to Just Once when you use Viber!!