How can I read epub or mobi files with Kindle? I have purchased some ebooks which I have received in both EPUB and MOBI format.

Can I read these MOBI or EPUB files with the Kindle application ?

I copied the MOBI files into the kindle folder, but they do not show up in my Kindle main screen.
I will answer my own question in the hope in helps others: I just had to reboot my device, and now when I start Kindle the MOBI files which I had copied to the Kindle folder are present in the main screen.

So obviously the Kindle application must be restarted when you add ebooks to its folder (without downloading them via the Kindle store).

UPDATE

Added the Kindle folder:

/sdcard/kindle


Force closing and/or clearing the data, does not bring up an EPUB file I just copied to the folder. Will let you know after some more testing.

UPDATE 2

For those interested: the Calibre software, can convert any e-book between numerous formats (including EPB and MOBI). So, if the EPUB format is not recognized, just convert it to MOBI and use the converted file.