Make stickers stay on plastic with clear nail polish?

I got some stickers from Urban Outfitters, and I used them to cover my iPhone case, which is made out of plastic. But I want to make sure the stickers don't peel off. Will a coat or two of nail polish top coat be of any help? I don't have decoupage glue or whatever. I was thinking that the nail polish would help temporarily. And are there any other ways to get stickers to stick well to plastic?

Will verizon fix my cracked screen if i have insurance?

Okay well I got an iPhone 5C in January specifically to not crack it, i got a case that wasn't cheap and boom it cracked a bit. It's been getting worse and even a piece of glass fell out and this panics me because this is how my last phone broke…
the insurance i have for verizon costs me $9.99 monthly, i'm not sure which it is but will it fix my cracked screen?

Why Isn't YouTube Working On My iPhone 5?

So I got a new phone about 2 weeks ago and YouTube works only sometimes like yesterday it was working perfectly fine, and then boom! Today it wasn't. Any suggestions/help?
My network is tmobile.

Why does my iPhone 4S act up all the time?

It freezes constantly, crashes, the internet can be really slow sometimes, and the iMessages send as text messages alot when the other person also has an iPhone. It's only a month or so old, how can I fix it?

I want a new iPhone 5s on Verizon?

I have a one year-old iPhone 4, and since the new iOS 8 will be coming out this fall, I want to upgrade my phone since iPhone 4 will not receive this update. Also, because the iPhone 4 is pretty glitchy on iOS 7. My next upgrade is in September of 2015. How much would it cost to buy a new iPhone 5s with the early upgrade fee that Verizon charges?

How to read my texts on my mac?

So i backed up my iPhone and hopefully that means my text messages are backed onto my macbook air swell where can i find them to read them?

I suddenly can't access eBay on my Wi-Fi anymore?

I can access it via 4G, but with my computer and iphone using Wi-Fi, I can't get through to eBay. I know I didn't block any sites on my router page, so what happened? Is the site down for Wi-Fi users?