I'm using a Nexus One with stock froyo.

Last week, my old sim just died on me, so I had it replaced at a maxis centre for RM 10.

When I was using my old sim card, my phone number displayed just fine in About phone > Status, however after replacing the sim card, it now displays as Unknown.

I have an old Sony Ericsson K800i and I tried to edit the phone number by going to menu-->contact-->more-->options-->special numbers-->my numbers-->my mobile, but the "Edit" option wasn't displayed. (Maxis probably locked the sim card or something?)

What can I do now to fix this issue? Without the phone number displayed, my messaging app isn't displaying my picture properly. If I were to call Maxis, what should I say to them?