i wana exchange my sim for other one.
how can l block my sim?
please tell me how can i adjust it so that the charges will nor come out next week.
today is last day so i have to change the sim soon
thak you for your replying
Just to clarify one of @petergdownload points, if you want to transfer your existing number to another provider (i.e. porting) do not cancel your Optus SIM first because your will loose your number if you do that. Once ported, the old service with Optus should automatically be candled, but you can contact Optus to confirm that that is the case.