Far simple and easy way to type underscore(_) in opera mini in Nokia X2-01 than last post :)

Go to the browser on your NOKIA X2-01 and while the control is in the address bar, press the middle soft key (shown in the image) down.

Here you will get an option to insert symbols. Select this and you can enter type in the underscore(_) in a newly opened screen.

Proceed by selecting OK and enjoy your browsing.