Did you follow the instructions here?
Did you get any error messages?
Did you receive the porting security code by text message to your old number while your old provider's SIM was installed and working in your phone?
Is your old number displayed on your My48 account or a new 089 number?
Can you try going through the porting process again?
If you need to contact 48 support about this then see the links in my signature below.
