Congrats on the K-3 II. (My last camera was a K-3, great camera!)
This sounds like the phone isn't able to resolve "http://pentax" which doesn't surprise me much. It's DNS might very well be locked down to your ISP's DNS servers, or something else that will only handle "real" DNS. Resolving to "http://pentax" would have to be done via some other type of name resolution that your phone may not support. I'd expect android phones and iphones to resolve it correctly, but with android it could easily vary from brand to brand and from phone provider to phone provider, and on Windows Phone, I'd just expect it to explode.
On your computer, open a shell (cmd prompt on Windows, terminal on Mac OSX or Linux) and type "ping pentax" It should show you an IP address in the output of that command. Then, use "http://xxx.xxx.xxx.xxx" where the x's get replaced with the IP address from the ping command's output.
All name resolution does, is resolve a name (such as "pentax") to an IP address. Also.. make sure that your phone is on your WiFi and not on 3G/4G etc..
P.S. I just had to edit this post, because the forum changed "http://pentax" without quotation marks to refer to this pentaxforums site instead.
Originally posted by syslyn I enter "http://pentax", I get a message on my phone saying, "Sorry, the page you were looking for does not exist or is not available." I tried this several times, and I keep on getting the same results.
I then thought, let's see what happens if I try to find the FluCard with my computer, instead of my cell phone. I found it. I entered "http://pentax", and it worked. So, I know there's nothing wrong with the FluCard.