As of right now I'm using a BB 9900 for my personal phone and a 9800 for work. Quite honestly, I'm getting sick of having to carry two devices. We now have the option for a BYOD program at work, however, it will only work with iOS or Android. No luck with my 9900. My friend will be upgrading to the iPhone 5 when it is released (my upgrade isn't until May). He's offered to sell me his iPhone 4 for $75. I'm strongly considering this as I could easily get more than that for my 9900, and then could ditch the 9800. It would be tough to ditch BB completely, but I feel like the positives outweigh the negatives. My question is this, for those of you who use an iPhone for work, how do you like it? Do you feel that it is quick and efficient for everything you need to do? What are the positives/negatives? Any input is appreciated!