1. wifi is sometimes not automatically connecting at home or office although it is set to auto-connect at both places. Incurring data charges when I assume i'm on wifi. Have to switch wifi off and back on again for it to connect. 2. Exchange mail- have had several recent incidents where I get a few hours-worth of emails all at once even though it's set to push and they normally come in instantly. 3. Exchange calendar- when I enter something on desktop calendar, it automatically appears on my phone's calendar but if I enter something on my phone calendar, it doesn't synch to desktop calendar. Any help/ideas appreciated!!!