If I unlock my verizon iPhone 4 what networks can I use it on?

I just bought an iPhone 4 off my friend for verizon, I was wondering if I unlock it what carrier could I use it on? Originally I wanted to use it on AT&T prepaid but I found out there's no sim car tray so I can't now I was thinking about using it on virgin mobile if possible. Plus does anyone have a link to where I can find out how to unlock my iPhone because it doesn't have a SIM card tray?

Trying to unlock iPhone but can't find proper non-scam site?

I'm trying to unlock my iPhone 4 locked to Telstra. I bought it on ebay so I don't have contact with the seller. I Can't find a cheaper way to unlock it than the $60 apple solution, I've seen a few sites that have lower prices but I can't be sure of the legitimacy of it. Anyone know a good site with some good rep that can unlock it for cheap? Please!

Should I get the Commuter or the Defender Otterbox case for iPhone 5?

I used to be an iPhone case whore lol. I buy every case I see on mall stands (which range from a dollar to three dollars, sometimes six), and currently I have 29 iPhone 5 cases. They all look super duper cute, except they never really protect my phone. I feel I wasted so much money on cute phone cases that are useless except for them prettying up my phone.

My friend introduced me to the Otterbox cases, and I don't know which to choose. This time around I'll be sticking with just ONE case, and I want one that will protect my phone (since I often drop it).

Tags to get instagram likes?

What can I tag my pictures with on Instagram to get more likes? My friends has 45 followers and she tagged her picture with some things (she deleted afterwards) and got 60 likes! I have 95 followers and get no more than 20 likes on my pictures!

Recently, I tagged a picture with:
#iphone #iphoneonly #likeforlike #quote #quotes #thefaultinourstars #like #follow #followforfollow #photography #instagram #love #photooftheday #picoftheday #instadaily #likebackteam #bestoftheday #cool

But I only got 12 likes. Please leave some tags to get more likes below!
If it works, you'll get 5 stars!

IPhone help apps keep closing randomly?

I have updated my i phone and the games but for some reason when I'm on Facebook or playing a certain game it closes out of no where I only have 11 apps so I know I have plenty of memory and I've tried restarting it. Anything advice would help thanks!

How to recover all my information from my iPhone 4s?

I plugged my iPhone 4s my computer, and a screen popped up. Without thinking, I clicked accept, and it started "Restoring" my iPhone.

Before I knew it, all of my pictures, contacts and everything else from my iPhone was lost, and everything from my LAST iPhone, which was 2-3 years ago, went onto this one. All of the pictures, contacts, memos, everything, from my last phone, is now on this one.

I don't know how to change it back. Someone help me please?

Is shopping via internet SAFE?

I'm thinking of buying an android iphone from Amazon, but I read once before that internet crime is in the billion$ a year, and once I did get ripped of by a company - by not understanding the fine print catch to it - but not for much. Though I do 98% of my shopping strictly with cash, now I'm tempted to use my credit/debit card and buy through internet. So is that kind of shopping safe? Anyone had bad experience and would advise against?

Added (1). Thanks to both answers. Alex, to keep my contact with Amazon for 6 months means what?-just keeping my account open, or do I have to be buying oher stuff at certain time intervals-like every 2 weeks-?

What does the 'other' in the iPhone summary on iTunes mean?

I think I read that it means something is corrupt in your apps, so I deleted All of my downloaded apps yet the 'other' section got bigger… It's currently 6.13GB. Which is much more than my music, photos & even my apps… Since I don't have anymore. What would someone recommend? IS it worth restoring my iPhone as brand new? I've restored it twice now downloading everything back from iCloud but the other section ALWAYS comes back. When I first restore it it stays away and is normal, but then it comes back and I don't understand why. Can anyone help me?