While we’ve been getting some pretty high-speed downloads on T-Mobile’s new 3G network in New York and Philadelphia for a while now, it looks like the LA network is now getting a speed bump according to Arsen Karapetyan. We already know T-Mobile has been working on upgrading their 3G network to the 3.5G HSPA+ version who’s speeds can rival Sprint’s 4G WiMAX, so it’s good to see some nice upgrades cropping up around the country.