low internet speed

Mar 5, 2013
I'm having a problem with internet since 1/2 days.
The first days it was very fast, 800k/s via 3g in Milan and 500k/s via wifi at home (yes I have ****** ADSL) but now 3G don't go over 2k/s (with some rare peak at 10k/s) and 100k/s for the wifi.
Did anyone have my same problem? How do you solver it?
I just tried to re flash the rom via Updater cause, as known, recovery have some problem with the sign.
This is very frustrating since I retired the p990 for signal problems :(