Opra is not a system but A browser and its a software application that can be added on the phone, to install it again on the phone you have three options depending on what equipment you may have,but first you have to ghet the app again. the file ends in .sis (this is not a windows system file but a Symbian Installation Software)to install it you have to transfer it to the handset and here come in your options,
No1 : transfer it over with the software you got with the phone using USB cable, Bluetooth Dongle or IrDa Dongle.
No2 : if you do not have any of the connections the is to send the file through e-mail to the phone (this require e-mail
settings configured on the phone)
No3 : a bit weird but works, if you have an application installed on your phone called FExplorel the all you have to do is to put the mmc from you phone in a card reader and transfer the file to it, then when the mmc is back in the phone open FExplorel and search in the mmc for the file and execute it.
any of these should work .
if by any chance you where inquiring where to get the actual app from then i've got a couple of options.
http://www.my-symbian.com
or you can search for it on a p2p network app
good luck!
Stephan J Winckler, April 2005