I should add that according to their phones & services page, 3G is only used for GPS assist on the Vivaz. Data is over the GMS net. Another reason to just disable 3G...
I did the same. There's no flashlight feature. You can set the flash on for the camera and the light will come on if you hit the camera button. Not full brightness, but a lot better than nothing. Wi-fi is fastest as a rule. It's also supposed to ...