We can't get anything at all over the phone line (not even a proper voice conversation if it has been raining!). HOWEVER, we can get 3G, via both 3-mobile and O2 (we currently pay £18 a month for 15GB of data on 3-mobile).
Also, I've just upgraded the broadband dongle this week to a whizzy new
4G-ready wireless router that takes an
external "MIMO" dual antenna. It's all a bit technical, but what I can say is that we're now getting 8-9 MB/s download and 2 upload, which is fast enough for most things. Also that's just with the antenna sitting inside on the windowsill, so hopefully once we've got it mounted on the house roof, it will be even better.
So, if you're struggling with poor speeds over your phone line, do recheck 3G coverage for your area, as more and more areas are now starting to get reception. HTH!