Why does my Wi-Fi turn on and off?

I'm having problems connecting to the internet both with my laptop (running windows 7) and my iphone 4s.

1. If i plug an Ethernet cable into the laptop it works fine.
2. Sometimes the Wi-Fi works fine on the laptop but other times it seems to randomly stop working
3. Sometimes the Wi-Fi works fine on the iphone but other times it is 'unable to join the network'.

i have rebooted both laptop and phone multiple times as well as the router but it doesn't seem to solve the issue.

Anyone have any thoughts?!

Can you jailbreak iphone 4 without itunes?

I can't make itunes work so igive you, ijast watn to jailbreak my iphone 4, can someone tell me which software allow me to do that
And when i try to start itunes it say i need apple application support, but i try to install it again and again but it still not working, so can you give me some advice for this thanks

IPhone 5s unlocking explanation?

OK so I live in the West indies and I have family in the US. I want a 5s but they won't spend the full price for an unlocked phone. But they have unlocking services where I live so I suggested that they buy the 16g with at&t and I get it unlocked where I live. They said they have to set up a plan and contract with at&t. Can they just set up any random plan and give me the phone then I unlock it without paying for the service plan per month?

Can the latest iPhone 5s be operational on both GSM and CDMA?

Question:
With a lot of controversial information available, ranging from 2011 to current date, there's no concrete information (that I could find) on the subject of what the new iPhone can really do. They sell 2 main models in the US, a GSM and CDMA version. The controversy is that the hardware is identical and the different models display that they function in every band. "GSM / EDGE / CDMA EV-DO Rev. A and Rev. B / UMTS / HSPA+ / DC-HSDPA / LTE Band GSM/EDGE 850/900/1800/1900; CDMA EV-DO Rev. A and Rev. B 800/1700/1900/2100; UMTS/HSPA+/DC-HSDPA 850/900/1700/1900/2100; LTE 1/2/3/4/5/8/13/17/19/20/25"

So what's the down and dirty? I have read that the Verizon (CDMA) iPhone 5c/5s comes unlocked and is usable on GSM also. You just need to change you APN settings to receive data.
Is there a model that can work on both CDMA and GSM?

Scenario:
I have been scouring the web for the past few days to help my boss find a good solution for a true 'World phone'. He travels abroad, and is looking for something that gives him a lot of options. I have found that the iPhone 5c, iPhone 5s, and Samsung Nexus i9250 all have a very wide range of operation, there internal antenna and hardware supports penta-band (or greater). But with so much different and controversial info I don't know what to conclude would be a good solution.