Is viber free? What about when I'm out?

Is viber completely free when using Wi-Fi? I have an iphone so i was wondering if I'm out and i get a viber message is it no longer free? What if i'm not even going to answer, to open it do i have to pay?

How to complete the process of unlocking my iPhone 4?

So I had this guy unlock my phone


This guy here

And i need an unsupported SIM card…
I don't threw out my original sim thinking I wouldn't need it
What is a unsupported SIM card and where can I get one?
Supposedly I can just put the unsupported sim in the phone and connect to iTunes and my phone will be unlocked
Where do I get one of those sims? Any regular cellphone store?

My iphones sound isn't working?

Okay so all the normal sound is working microphone wise
i can make calls and receive calls
i can play and hear music and all the normal sound affects
its just when i record a video its fine then when i try and watch it back all i can hear is this quiet squeaking/crackling noise and i'm wondering why it won't work, and if i'm able to fix it myself as i need to be able to record videos!
i did have a problem with my microphone in the past but i got it fixed
if anyone could please let me know what's wrong with my phone that would be great

Not enough space for photos / videos?

I have an iPhone 5 on AT&T and I'm not able to take photos or videos even though i should have enough space. It says i have used 12.7 gigs and have 803 MB left (which should be enough to take pictures anyway. I barely have an apps (i deleted almost all of them to free up space and still can't take pictures… Also. I did most of the math (i think correctly) and i'm pretty sure its nowhere near 12 gigs.

What's going on with my iPhone?

I have the iPhone 4, it has one small crack on the back side, but other then that it's good as new. The other day out of no where, my screen turned to all pinstriped lines. It turns on, I can see it unlock but every single thing is lines, you can see your screen morving, but it's just lines.

Dead Pixels on IPhone 4 screen?

A couple months ago my phone became really splotchy, had horizontal lines across the entire screen, and the picture would stay after changing apps. Today a black splotch showed at the top left and a green line running down the side. I think the black is dead pixels but I'm not sure. Is there a way to fix this at home without replacing the screen or getting a new phone?