Older Nokia devices typically use (Java) or SIS (Symbian) files for applications and simple text or specialized formats for books. Top Reader Apps:
Downloading and reading books on Nokia devices depends heavily on whether you are using a classic Java/Symbian model or a modern Nokia Android smartphone. For Classic Nokia Phones (S40, S60, Symbian)
An open-source reader that handles multiple formats including EPUB and FB2. Where to Download Books: knigi dlia nokia skachat
A solid choice for EPUB files on Symbian S60v5 devices.
Offers thousands of free classics. If a file is too large for your phone, some versions allow splitting books into smaller 64KB or 128KB chunks. Older Nokia devices typically use (Java) or SIS
A massive library of over 75,000 public domain titles.
A popular source for downloading Java-based (.jar) book apps directly. For Modern Nokia Android Phones Mobipocket and eBooks on the Nokia N97 - All About Symbian Where to Download Books: A solid choice for
Highly recommended for S60 devices like the N97. It supports MOBI and PalmDOC formats. You can download it from the Mobipocket mobile site.