I remember for one of the applications (if not more) they would ask for your phone number. I decided to put my home phone number because we've had it for close to ten years and I'm always checking the voice-mail there. I don't even think the voice-mail for my cell is even working so the choice was clear.
Ironically, my mother was trying to change phone companies and to make things short: we lost our old phone number. Now, do you guys think this will be a big deal? any way to let them know of this? should I? I'm not even worried for some reason because they do have other contact info.
For the application asking for e-mail and cell, I did put my cell there.