the test is performed on http://mpulp.mobi/zip_test.php with UA SonyEricssonW610i/R1JD Browser/NetFront/3.3 Profile/MIDP-2.0 Configuration/CLDC-1.1

zipped content

 - size of downlaoded content + header: 0 + 0.32 = 0.32 kb 
 - download speed:  0 kb/second *

not zipped content

 - size of downlaoded content + header: 2.06 + 0.3 = 2.36 kb 
 - download speed:  48.86 kb/second *

zipped produces only 14% (2.04 less kb) of the ammount the not zipped does

zipped downloads 49 kb more per second.

not zipped price: 0.0472 NOK. zipped price: 0.0064 NOK. (at 0,02 NOK/kb)

*) does not really say anything... just nice to know