In what regard are you questioning safety? Wi-fi won't irradiate you or make your skin turn green if that's what you are worried about. From a computer security standpoint, Wi-fi is reasonably safe to use if it is on a password-protected network with WPA encryption; thus no one can access the files on your computer. yes
yes it does and yes you can use your wifi at your home
Yes it can use wifi and there is even a way for it to be a wifi hot spot.
Wifi password recovery is an app that you can use in recovering your wifi password.
It is not safe if you don't secure your wifi network. Anyone near you such as your neighbor can share the network and possibly steal all your personal info.
Yes, you can use the Pou when you do not have wifi.
Yes it is possible to use a Netgear wifi router on a smartphone. Smartphones have a wifi receiver that it can be used for wifi repeating or wifi giving.
WiFi usb adapter is a WiFi card.
Yes, I use it all the time. It's a great alternative to paying the contract price of an iPhone although you must have wifi to use it.
NO
public wifi...Mcdonalds
A wifi phone is just a phone that can use wifi. You would connect it to a wifi network to get a better signal for faster web browsing than a cell tower.
You can use Wifi on a DSI, if it doesn't work with you then it's probably because you have WPA connection security settings. WPA connection will allow you to surf the internet and go on the DSI Shop etc., but will not allow you to play games over Nintendo Wifi Connection. To do this, you will have to change your settings to WEP so that you can play on Wifi on your DSI. However, WEP is not as safe to use an internet connection as WPA, so be careful. Hope I Helped... Emounders