how to add my number?

[ravisoni7]

in the dial pad >setup >My number ,when i try to add my number then it says in valid index.why?
does this happens to me only or with all modders?
why does this problem occurs?any way to solve it?

[motomaster]

It is a problem everywhere, or specifically with some sims.

[aaunderscore]

i think this works on postpaid numbers mostly.
same happend with sony ericson w550i with me.
when i use a postpaid no. it shows the no. but not when i switched to prepaid.

[Casper]

It's always worked for me - but I don't completely understand its purpose.

[cherrypie]

Works fine on my prepaid sim.

[aaunderscore]

so, i think perhaps it doesn't work for indian sims