My dad just got his Nokia 5230, nice phone that comes with Ovi Maps 3 installed however there were no map data available. Since he didn't have GPRS enabled on his phone I decided to do some digging around to make use of the GPS device bundled into the Nokia 5230.
Credit to symbian underground for helping me get this to work.
The first step is to have you your external card ready. Run Nokia Maps on your phone once before you add any maps or voices. This will create the required folder structure on your memory card. Quit the application after that.
On my Nokia the folder structure is cities with a subfolder called diskcache, filled with 16 subfolders called 0 to 9 and a to f, and each of these folders have another 16 subfolders 0 to 9 and a to f.
For India, download the following file from Nokia itself
Extract the zip file into your local computer, once done copy drop the 16 folders called 0-9 and a-f into the diskcache folder of the Nokia 5230. You can do this by connecting your device as a external hard drive via the Micro USB port.
Thats it, maps should now work. You should now disconnect the connection to the computer and only then run maps again.
If you want voice as well download the following files
English or Hindi
Extract all the files into the cities folder. That is it.
For other countries check the maps links here
The voice links of other languages are here
If you want to enable free Navigation, do read this post
Hope it helps, do leave me a comments. No files are hosted on this site !