I'm from Spain and I bought a Nokia Lumia 920 from UK. Everything works fine but I have a problema with HSDPA networks. With my Lumia 800 when I have HSDPA signal, the phone displays "H" on the top and the connection speed was fine, but with the Lumia 920 it shows "3G" and the conection is slower than the Lumia 800. For a seconds, with the mobile data enable, the cellular data connection icons dissapears but not the signal strength icon. Once I saw the "H" icon, but it dissapears quickly. I saw the specifications and the Lumia 920 from UK supports all of spanish frequency bands. What can I do to solve it?