I have a Sprint HTC-EVO 4G. Today it's snowing, I'm in a downtown high-rise, and I'm only getting 3G. Would a booster antenna help (either now, or in general)?
In general, how can I know whether my 4G phone with a non-stock ROM still has 4G functionality? I've read in various forums and how-tos that rooting and flashing a new ROM on your 4G Android device ...
I have an EVO Shift, and often see an icon similar to 4G! (see enclosed picture with red arrow) in my android status bar. I have consulted with my carrier ad-nauseum, read the manual, rebooted, ...