How to Connect iPhone 3GS to Home Wi-Fi?

I've completed the setup, but I have no Service. I try to enter the CORRECT password, but it keeps saying continuously 'Unable to join the network…' Please Help FOR 50 POINTS!

How to post via iPhone on facebook? - 1

I'm using iphone 4, when I post something on Facebook it doesn't appear "posted via iPhone" how do I make it appear? Also can I make it appear "posted via iPhone 5s"?

I got a new iPhone 5s but it won't let me sync music?

I got a new iphone 5s and backed it up using icloud, it automatically gave me back the music i have payed for from itunes, all of the other music will not sync to my phone. It says over capacity even though it hasn't put any songs onto my phone. I don't know what to do

IPhone won't connect to my Windows 8.1 PC?

Whenever I plug my iPhone 4s into my PC it keeps on connecting and disconnecting over and over again. This is strange as all of my other devices work on the usb ports. I have tried connecting this phone to all of my usb ports and all have the same problem. Can anyone help me fix this problem?
Motherboard: Gigabyte Z87 HD3
OS: Windows 8.1

IPhone 4 Charger Stopped working?

I got a 10ft iPhone 4 charger on Christmas charged my phone 1 time yesterday and its 4am right now & it's already not working! WTF is up? Why? My other charger is broke & this is all I have! Why did it stop charging after 1 day? I have it plugged into my wall only

How to change app store update apple ID?

I use iPhone 4 32GB. I use 2 apple ID. But when I update the app it loads the another one of my apple ID. I can't change the ID even I go to setting>store and change it. What should I do In order to get the right apple ID for my update?

Should I buy an Iphone 5s from America and use it outside of America?

An Iphone s where I live costs around $600.In America it costs around $199 plus a $70 year contract so it seems more reasonable to order it online from America. If I order it from America what would I need to do and what should I know before ordering an Iphone from America and using it in another country?
Besides unlocking the phone, what else do I need to do?