Magicjack iphone app error 20? - 1

I have a problem with my iphone 4 magicjack, I removed it and then installed the updated version.
Then i tried opening it but it can't connect. It says network connection fauilure [error 20] but my network is working fine.

I tried logging into my magicjack account and i renewed my subscription for one year but i still get this error message.

How to solve this

IPhone 4 and iTunes won't work. Trouble adding the music on my phone?

I have the iPhone 4 and I imported several CD's, downloaded two mixtapes, and bought a few albums and songs and the ones that I bought are fine and are on my iPhone, but the mixtapes and some of the songs on the CD's won't go onto my iPhone. I have hit apply after trying to add them. It didn't work. I put them in a playlist. Still didn't work. It took me a very long time to get these CD's I wanted onto my laptop and would like them on my iPhone. Please help! Very appreciated.

Added (1). I have tried syncing. It still doesn't work. :/

Added (2). I have synced to the computer before. The music plays in iTunes. I have updated iTunes. There isn't an error message.

How to play 10 second samples of OWNED songs in Itunes?

I want to play just 10 seconds of every song that I own so that I can pick out individual songs that I like. My Itunes Library is too big for me to hold on my phone now and I want to pick out individual songs. Listening to each song individually would take 2 days and thus I need a way to drastically reduce the time taken. Is there a way to do this like there has been in the past (on my iphone OR my computer)?

Best format for ripping dvd's that all apple devices recognize?

I have over 750 DVD's and I'm struggleing to store them, so i was going to rip all of them and store the DVD's in our loft. What is the best format to use that my ipad, ipad mini 2, apple tv, imac, macbook pro and iPhone can all recognize and that Itunes will recognize?
I'm currently using any video converter ultimate, however it has different formats for all these devices, is there one universal format. I don't mind buying different software.

How many drops does it take to damage iPhone 4S?

Recently I changed my phone from iPhone 3GS to 4S. My 3GS has encountered lots of dropping onto the ground, causing the Power Button unusable, Home Button not functioning well (had to press hard), and the Mute Switch which when switched to Mute state, the phone was changing to Unmute and Mute and repeating itself. The operation almost relied heavily to Assisstive Touch.

Now I got this 4S recently, my dropped few minutes ago (I think it's a light drop) and of course, the phone is fine. I have this "protective" case on, but the sides aren't rubber. So I wonder how many drops to the ground does it take to start damaging the phone?