err im not so sure but i still see phone shop selling it 

discontinued??  never heard of such news...but like andx517 says, still there are a lot of shops selling

I dun think so its being discontinue. Mayb juz tat the produce less of this model n focus on sum higher end 1.

my opinion would be that they think n81 not sellable anymore, so they stop stocking in, and when customer ask, they just say discontinued...they didnt lie, cos it's discontinue on their shop..haha

it's in the phone already, when i buy it..

but i didnt play with it before oh.. No GPS, no point using it. and i didnt dl any maps into it wor.

should i delete it?

Try clearing your browser cache n c. Delete 1 file named reserved which is located in the private folder there can save around 4MB but u need 2 hack the phone first.

might gonna buy a N81 for gaming purposes..
is it worth?

this phone is ok for gaming..
so called device for ngage, but the lacking of 3D acceleration chip will cause some lag and frame skips on some games like asphalt 3 or ONE(with all settings turn on)
but if u are a audio fan, this phone is really good when it comes to both the phone speaker and headset..

but there is one thing that u need to take note, you will need to take good care of the phone..i drop the phone quite a lot last time, ended up having slider loose problem, slider jam, and camera issue..

i see ur siggy that u are using N85, i think you just stick to that phone..since it's hardware specs are better then N81

Yes u can x-plorer is a gud application.

dat gps external built in battery or wut??
battery can last for?half day?
r u using opera for internet browsing bro?