when u got really good coverage, itll have 3g or 3.5 under the bars. 3g is 7.2mbs and 3.5g is 10.2mbs from memory.
and with 3g i get around 150kbs speed when downloading songs
u could... turn off all power saving stuff
and check if ur connection is for internet or wap. it makes a big difference but both connect to the web