I had a sidekick ID for about 2 months....then sold it because it was not as great as I thought it would be.
It would shut itself on and off. I had a pin to my sim card and i would never know if anybody called because I would have to enter my pin to enable it first.
Had crappy service all the time! and whenever i was doing anything else it would block all calls and direct them to my voicemail.
I switched to an ugly azz razr, which works fine. It just sucks that i wasted money on my sidekick ID