Wrong SIM (wrong serial number): 

You can walk into any Digi Store to replace the wrong SIM with a new SIM card. Or, call Digi’s Customer Service Hotline at 0162211800 for assistance.

Faulty SIM (SIM not working):

Please call the Digi Customer Service number 0162211800 for assistance.

But, if you're switching your service to Digi from another mobile service provider, please understand that your SIM will receive a network, only after your Switch to Digi/port-in process is successful. You can check your latest port-in status by logging into your MyDigi account through our website.