"Error: Cannot resolve hostname." Why does that show up on my phone when I try to...

...acess the internet? I have a samsung phone from telus that I just got recently. I recently got a ringtone off of the telus website and when I recive the message on my phone to download it.. it says "Error: Cannot resolve hostname"

that also shows up when I try to access the internet. Why is that?
It could be because the phone is pay & talk...

If thats the case, does that mean I cannot download ringtones? (or if theres an alternative way of getting downloading a ring tone)

i have the same thing on my metro pcs y does that show up on my phone when i ever get on the internet does anyone have any answer