Nokia Bluetooth trick To Keep Bluetooth ON For Forever

Using this trick you will be able to make Frustrate Your Friends by Keeping Their Blue tooth ON For Forever.

We Know That When Blue tooth Remains Enable Phone Consumes Battery At A rapid Rate.So What Will Happen If You Switch On Blue tooth Of Your Friend's Phone and they will Unable To switch it Off.
This Is Really A Nice Blue tooth Trick And Doesn't Need Any Software To Do That... :)
                               
Lets Take A look How We can Able To Do That.

1). Just Switch On The Blue tooth Of Your Friends Phone.
2). Press *#9990# .
3). Done!! Anyone Can't able to  Switch Off Blue tooth Now.

Now If you Want To Switch off Blue tooth.Then Just Switch Off Your Phone For  5 Minutes. And then Try To switch Off Blue tooth. :)

Note: Some Nokia Phones Doesn't Support This Trick...