Man I remember that phone! Despite the lack of the headset jack it was still popular and, ironically enough as the article states, Apple kind of has the trend of "not giving a damn about traditional headphone jacks" on lock with the very FIRST iPhone which had that weird recessed Jack (total pain in the ass).]
Those were awful times, with no headphone jack, I remember having a Nokia N80 in the Symbian days, had no 3.5mm jack, then moved to the N81, with its 3.5mm jack and powerful DAC for its time, who would've thought Apple would take things back to 2005 with an iPhone in 2016.