You'll need to post a bit more information if you want assistance from the Community Forum.
What exactly are you trying to do, what steps are you taking to do it, what happens, any error messages, etc. Mm
If you mean the 48 SIM Menu mentioned here:
then it may be named something else similar.
E.g. on my Android phone it's called SIM Toolkit.
See here for other possible names:
If you need to contact 48 support about this then see the links in my signature below.
