What advantage has WiFi over Network connection
 

I have a BB contract with unlimited internet and e-mail in the contract. I have set up WiFi connection to my home Internet as well.

What advantage do I have to be connected to my Mobile Network Internet Provider as well as to my Home Internet Provider via WiFi?

Does WiFi overrule Mobile Network download?

I have no GB limit on the down/upload volume so I don't have to limit my usage to reduce costs.

Is it speed? Should I only use it if I browse the internet a lot? Should I each time disable WiFi when I walk out of the house?

I feel it drains my battery very fast (<24h) in a new (<3 week old) phone.

Wirelessly posted (8820)

I use wifi at home when I'm browsing a lot, like reading rss feeds or the wap version of BBF, because it is faster than EDGE. I turn off the mobile radio to save power. When I'm not using wifi, I turn it off for the same reason, to save power.

I'm not sure how you will see it on your model and OS, but look in options / mobile network / connection preference. Set wi-fi preferred, or mobile preferred, as you like.

Wirelessly posted (9530; (I'm mobile) MF231; 35h)

The WiFi speed is about the only advantage you will see.

Wirelessly posted (8820)

Actually, I usually have GPRS at home... Wifi is a lot faster. As JSanders says, it's the only reason I switch to wifi over mobile.

money could be also an advantage if you have limited data plan..........

Thank you all for your quick answers which make sense. I had a look in my options but cannot see anywhere to set Use "WiFi over Mobile Network" so I assume the phone does it for me automatically.
All the best and I am sure I'll be back with more questions one day....

The battery life on my Bold 9000 is much better with wifi vs. 3G. If I am out of the house and away from my wifi connection, my battery will last about 15 hours. When I am home all day and on wifi, I can get through the day with 30-40% battery remaining.

Wirelessly posted

I recently found another advantage. WiFi let's me download larger email attachments. My mobile network provider limits them to 2MB.

Speed.
some carriers don't limit email size.

Wirelessly posted

The biggest advantage to me is I can be on the phone and surf the web at the same time.