Not a mobile phone, but our number has been in the family since 1955
good for you! mine is only since 1982
Ive had the same cell number for 6 years or so
none, I have the same mobile number for 7 yrs..........
Never unless I was moving out of the area and wanted a number within that area code or if I wanted to cut off contact completely with some people I know. It would be a pain.