Hello
I too live 5km from Ampolla in the campo!  and had comms problems before settling on a British satellite system.  Fast ....466 kbps but expensive hardware to buy and monthly subscription.  Have you had the chance to check the speed of your 3G card?   Is it the advertised speed? I'd be interested to know.   If you go to   www.adslguide.org.uk/tools/speedtest.asp      you can do a free test; very useful.
Bi.