My Iphone 4 is not locating any Wi-Fi signals?

All of my other devices are working fine. It is not the Wi-Fi. What do I do.

-Go on Settings
-Go on Wi-Fi
Is Wi-Fi turned on? Is ask to join networks on?
You may have to type the Wi-Fi name in on the Other. Button

Unplug your router. While it is unplugged reset all network settings on the phone. Plug in router… Wait a minute then try to connect. Ensure airplane mode is disabled. If the network name is not showing after this backup and restore phone.

What band Wi-Fi is set as default by the country?
if its a 4 band Wi-Fi then iPhone doesn't recognize the access point

Y do you an have an ipune 4. The an iphone 5 is out. Mark has one. I don't very money alot. My mom said that we don't have mony for the pune. I an are mad about it. MARK doesn't no that i font have 1. I just an a want 1