how does iphone do DNS lookups?

[beijingjj]

(please let me know if this post would fit better elsewhere)

I know a little linux and only as much of OS X that overlaps.

How does the iPhone do DNS lookups? I was having some trouble with name lookups when I was using GPRS so I deleted /etc/resolv.conf assuming it would be recreated next time I use it or reboot. Nothing has made it come back. Here is the weird part: I can connect to my wireless network and web and email work fine, and if I go to the terminal prompt I can ping yahoo.com just fine too, but if I type "dig yahoo.com" it times out, presumably because the /etc/resolv.conf file is empty. So where exactly does this thing store nameserver information?

[ishcabittle]

for future reference, if you populate /etc/resolv.conf with:

domain lan
nameserver 208.67.222.222
nameserver 208.67.220.220

the unix tools that come with the BIND DNS server package will work (dig, host, nslookup).