I wanted to switch my Treo 650 with VZW to a diffeent number in my family share. Switxh went through but when I checked online the insurance was still on the old number. VZW couldn't change it and Asurion said they wouldn't either because the equipment was over 15 days old. So it looks like your phone isn't actually insured but rather the line is insured.

If you ever change your number you will no longer have insurance on your phone. Nice, huh?