What Francine said isn't true.
In your phone's browser, type http://www.umnet.com
They have loads of stuff that can be had for free!
To download the items from umnet to your phone, take note of the ID number of each of the software items you want. You will then be told to go to http://m.umnet.com
and select "Download by ID". Follow the instructions on that page to receive your software.
I strongly recommend getting Opera mini as your first download.
Also, make sure you've got a lot of minutes on your phone as unfortunately, browsing on the LG800G's stock browser is kind of slow (that's why I recommended Opera mini - it's a lot faster and you won't get "page too large" or out of memory errors because Opera mini compresses the sites).
OOPS, my bad.
Mobilerated.com supports 1024 LG models but the LG800G isn't among them.CORRECTION
At Mobilerated.com select T310 when you set mobile as the T310 is an aka of the 800G.