That is correct. At the time this radio was produced, 700 Mhz trunking didn't exist. And while the frequency coverage can be opened up, the sensitivity on the opened up frequencies can and will vary widely, since the radio wasn't designed to cover these frequencies
Good job! The wiki is your friend. Here's another with a Phase-I and Phase-II "cheat sheet", though you'll have to click each scanner's respective wiki link to see frequency coverage
Partially correct. Phase-I YES. 700mhz, NO!. The Pro-2096 is the base version of the Pro-96 you inquired about in a previous thread, so aside from form factor, the specs are identical