If your phone can connect via wi-fi, then yes, you can. All you have to do is enter the passkey and you can use wi-fi as a connection. It's much faster via wi-fi so you will be pleased.
Yes. You can connect through a home router my going on wifi settings and putting your wep password to connect to your home router.If this doesnt work go call GeekSquad.
The EMID and serial numbers are located under the battery. However, if by registration number, the question is asking how to activate the phone, then please contact service provider.