Is your cellphone WAP-enabled? If so, you can visit nairaland.net on your cellphone by simply entering the url: http://wap.nairaland.net/.
The above address allows you to browse, post new topics, reply/edit existing posts, etc.
If all you want to do is browse and not reply to posts, you can also use the page http://www.nairaland.net/mobile/.
Let us know how it works out for you, and the kind of cellphone you are using.
Enjoy!