The 7100i, is still my all time favorite BlackBerry device, I traveled the world with that phone and it never let down. I was on Nextel at the time and it also had the built in walkie talkie function, which gave me the best of both worlds.
I still love the old track wheel navigation method and I could fly through all the menus. Only issue I ever had was when I switched to Gmail in 2009, Gmail and BlackBerry at that time did not get along for some reason.
God, I miss the simple old days, still have a soft spot for the BlackBerry brand and is why I moved back from IOS to my z30 and not looking back.
Send from my lovely z30 on T Mobile USA