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: 1.07 + 0.24 = 1.31 kb 
 - download speed:  9.9 kb/second *

not zipped content

 - size of downlaoded content + header: 2.26 + 0.19 = 2.45 kb 
 - download speed:  26.55 kb/second *

zipped produces only 53% (1.14 less kb) of the ammount the not zipped does

zipped downloads 17 kb more per second.

not zipped price: 0.049 NOK. zipped price: 0.0262 NOK. (at 0,02 NOK/kb)

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