why don't you just try it and found out? i'm sure if it doesn't meet your satisfaction sprint will be glad to give you a refund.
i have a windows mobile phone with sprint so i'm able to use a app to stream.
the web page is maybe over a year old, but do a google search for sprint sirius music and click on the first link.
i didn't see faction listed and don't remember if it was a regular sirius channel before the merged music channels.
or, depending on how long you've been with sprint, you may be able to get $150 towards a new phone.
well the instinct might as well be considered a smartphone, in my eyes.
not sure if you've been there, but let me suggest checking out Sprintusers.com - The Place for Sprint Phone Reviews, Sprint Tools, and Sprint Ringtones. or Instinct Cases, accessories, news and Instinct forums at Everything Instinct
i'd ask around in the instinct forum @ sprintusers.com. i'm sure if there is an app to be had, then its probably there or someone can direct you in the right direction.