My new 8310 is slower than my old 8700... what gives? It's not the Internet / data connection, it's the device. Unlocking the keys takes about 3 seconds for it to respond. Navigating through the menus is sluggish. I haven't put anything else on there except the google apps. I notice some things like PTT are in the switch apps menu - can I disable this, I never use it? Should I get a micro sd card? Do I need to update the OS?