Apps for chit-chatting with people?

Hey folks just wondering if there are any apps or ithings out there that can let me vocally connect with anyone one in the world, as I can recall old times such things were called IRC(not sure if the name is correct) but is there something similar designed for today's iPhone?
Bunch of thanks!

Should I switch my iPhone 5c for an iPhone 5?

Okay my iPhone 5c has 8GB and the iPhone 5 I could switch to has 16GB. The iPhone 5 is not very new, over a year old, and my phone 5c is almost a year old. Would it be worth it to switch for the extra space?

I forgot my iphone passcode - 1

My iphone 4 is disabled i need to connect it to itunes but i don't have a computer. Can i download itunes and do this at my neighborhood library.

How to know if I win Mega Millions or Power Ball?

I wasn't around to watch it on TV to look to see if I won. Am I able to go to convenience store and have them check ticket? If not, how do I check to see if I won anything? I think I can look online but I can't get to internet this weekend (at an event all weekend by water, so iPhone internet isn't working too good)?

What part of my iPhone 5c needs to be replaced?

I'm gonna try to be as specific as possible so please bear with me if I seem to be rambling. I dropped my iPhone 5c a while ago and the top two corners(above the touch screen) fell off and the top right corner popped out of the casing a little bit. At first the phone became very unresponsive to touch and would even register touch without me actually doing anything, that problem fixed itself for a while and the only issue was that any button on the keyboard where the "p" is located was unresponsive, which was manageable for me. However, yesterday the issue arose again, now whenever I unlock my phone and attempt to swipe to the side to enter my pin it won't register unless I lock it again and unlock it very quickly. Plus, the screen is becoming unresponsive to touch and registering touch by itself again. What do you think the issue is?
I've read that my issue may be the digitizer/LCD something along those lines, does any iPhone repair place do these kinds of repairs or do I need to go another route? Thank you!

Added (1). I also noticed that if I press kind of hard on the right side of my screen when attempting to unlock my phone I can unlock it on the first try instead of the second try