i have a wireless site that is aimed at vision users only. when i first got vision, sprint was the only major carrier that had any kind of good internet access plan for the average person. if this is not the case, please correct me, because i would love to have my site be more universal.

anyway, trying to detect a mobile browser has been hell. i relied on seeing if 'mozilla' was in the browser agent but the sanyo 8100 ( i believe ) sports that so i quit using that.

for a long time i've had no kind of detection at all, so you can access the site via pc, but i don't want that to happen.

i'm now seeing if there is a "@sprintpcs.com" in the "ClientID" header. i have a couple of questions about this, though.

is the stuff before the @ our phone number encrypted?

if it is, is there anyway to decode this information? (i would assume the answer is no)

again, if it is, is this a one way hash? or can it be decoded? (i would assume it would have to be decoded.. doesn't really make sense to have it be a one way hash)

does this value ever change? i would LOVE to know the phone number for verification. but if i don't know the phone number, can i rest assured that this clientid does not change? can i use this is a surefire verification check? does this id get reset after browser reset? vision reset? phone turned off/on? anything?

if anyone knows these answers, i would greatly appreciate your sharing them with me :D