Can I get the iPhone 5s this way?

Can I get an iPhone 5S on plan and then unlock it and use it in other countries? And I can just tell the phone company I broke the phone so they won't charge monthly? I know this sounds terrible but I'm poor and I can't afford the unblocked phone.

Why can't I connect to my router?

My internet speed is 40/20Mbps. I have got a TP-LINK TL-WR740N. If I set the wireless to N mode, I can't connect to my router with my laptop and my iPhone can't connect either (both are supporting B/G/N). Router works only in G mode, but in G mode I get only 20/20Mbps. What should I do? I already tried installing DD WRT firmware but I can't get the whole internet speed with this firmware, and neither with the factory firmware.
Sorry for my English.

Added (1). I'm learning in an IT school but I can't figure out what the problem is.

My iphone 5 rear camera does not focus

I have an iphone 5, i had it around 3 months and i just installed ios 7, and recently when i want to take a picture, it does not focus even when i tap on the screen, it only focuses on close objects, i tried tapping with my hand but nothing worked ( i had the problem before ios 7) any solutions?

Is it worth buying the iPhone 4 in 2013?

I need to know if its worth buying the iphone 4 not 4s, the 4 in 2013. I need a new phone and i want an iphone. I don't want a 5, 5c or 5s. So is it worthit? Pros and cons please.

IOS 7 update requires 3.1 GB storage on iPhone?

My question is, does it just need this to install, and then the space currently occupied by iOS will free up, or will it use that space PLUS an additional 3.1 GB?

My phone is only 16 GB and I already have trouble getting everything I need to fit on it, so I'm not going to download this update if it's going to occupy that much ADDITIONAL space.

I can't remember if the last software update I downloaded required additional space or not. I don't think I paid attention at that point.

Basically, here's my question summed up:

My phone is running on iOS 6. This is occupying x GB of hard drive space. The new iOS 7 download requires 3.1 GB. When the new download is finished, will the original x GB become freed up or will it be taken over by iOS 7?

Iphone disconnected from Wi-Fi duing ios 7 update and doesn't auto connect?

My iphone 4s is froze on the screen with the apple logo and the progress bar. I think this is because when it did the restart thing my iphone disconnected from the internet but now my problem is that i have a passcode lock on it and can't just restore it in itunes and for some reason find my iphone says that my iphone is not online. I don't know what to do and anyone who can help it would be greatly appreciated, apple won't even chat on their website because i don't know my *** serial number