Best way/site to jailbreak iphone 4?

I've ha my iPhone 4 for a little over a year, and I'm just sick of all the restrictions. The problem is i don't want to trust just any site to do it because i don't want my device bricked. Anyone who's done it before and knows a good site?

My son broke his AT&T iPhone?

My son is 12 and he dropped his AT&T iPhone 5 while he was playing basketball with friends today, and now the screen's cracked. The phone is over a year old so what's the cheapest way to get it repaired or replaced, with out DIY?

One website doesn't load on my internet connection?

There's just one website that won't load on my internet connection, but will load on other internet connections (like my parents', or phone not connected to Wi-Fi).

I tried it (on my connection):
With different browsers (Safari and Chrome)
On my iphone 4, connected to Wi-Fi
Every time I have tried it on my connection I just get a blank page. But on other connections, it loads fine.

It works normally if I'm on the internet at my parent's house, or if I disconnect my phone from Wi-Fi and use data instead.

This is the only website that does this. Every other website is normal. I asked the site's owner and she has no idea why this would be. It's basically a normal wordpress site I think.

The website is http://clcomic.com if that helps. I don't mean to advertise I just want this problem solved.

Added (1). I'm also able to access the website if I use a web based proxy. Is that a sign its blocked by my ISP?

Added (2). I already said I tried chrome.

Will a dent in my mac book pro affect the hardware?

The other day i droped my iphone on my mac, it hit to the right of the trackpad and left a small dent on the aluminum. Will this affect it in due time? Is there anything under that side that would have broke? It works fine right now.

Can I get an iphone aboard and use it in my own country?

I'm travelling to USA. And i might buy an iphone over there because its cheaper. Problem is, i'm not sure whether its still working the same in my country. Well, the sim card and network is not a problem, i will use my own one once i reach my country. But i'm still worrying if there are any difference of what?

IPhone 4 won't receive calls but can make them?

I just got a new network working on it and I've texted and made calls to people but It won't let people call me. All it says to them is that I'm unable to take the call. Can anyone help me?