I'm a complete newbie with these smartphones... Bought 2 of the samsung admires (red ones, which I'm finding are not the metropcs ones). One is super fast and showing 3G while the second is showing 1x? and is super slow when connecting to anything. Why is there a difference?? They are the exact same phones, used in the same location. What do I need to do to get the second phone up to the same speed as the fast one??? Thanks in advance for any help!