Quote (Cel @ 1 Jan 2014 00:58)

Yes for optional!

But just a little thing that came to my mind ... IF you change your number for any reason ... how will you be able to change it here on JSP? It shouldnt be editable the whole time because anyone who hacked an account could just change it to a number he own.
And if you got no acces to your old number anymore for any reason they way to change the phone number with the acc would be very complicated I think.

In general it's a good Idea but im unsure how this should work.

Quote (straightedgerevenge @ 8 Jan 2014 10:29)

Yes, also should add it to the register form when you first make an account so that you can use it in the recovery process through the Contact feature.
Seems to be alot of problems with people forgetting old passwords and accidentally logging out.
Not many people forget what their old phone numbers are (if their number happens to change)

Only downside is that some people have friends (even internet friends) whom they have shared their personal phone numbers with, and this could cause some security problems.