Amplified internal antenna are all rubbish. However nowadays even external antennas can't reach a proper signal.
FM coverage has worsened over the years. Broadcasters don't invest in FM repeaters and in some cases switch to web-only (Jazz FM is one case). DAB is even worse.
I am not mobile at the moment but I get a good FM reception by plugging a rtl-srd device like this:
http://www.amazon.com/dp/B00C37AZXK/ref=pe_385040_30332200_TE_item
into my laptop and the install SDRSharp. The included antenna is just ok, but one could attach a longer piece of wire. With a decent antenna, even a couple of metres of wire hanging out your window, and that dongle, I can get good signals.
If instead of SDRsharp you install the included software (BlazeVideo), then you get a few digital radios and many digital TV stations.