I'm new to Android so forgive me if these are basic questions. But I searched the Net, read the manual and found nothing. My wifi and network connections change in the following ways: - Reception indicator will go from Blue to Grey, why? What does grey mean? - Sometimes, there will be black icons inside the Wifi icon. I'm assuming that's to indicate data transfer, but are there two icons one for up and one for down, or is it just one. It's so small you can't really tell. - The Antenna signal sometimes shows H, 3G and just the Bars. H is HSPA I'm assuming, but how do I know if I'm getting HSPA+? If there is no H and no 3G can I assume it's on 2G? Thanks in advance.