Question: how to change my vodafone postpaid to prepaid online?
Answer: Step 2: Ask for Postpaid to Prepaid Migration Form & Fill in Necessary Details. ... 
Step 3: Pay Your Dues. ... 
Step 4: Submit the filled form at the Vodafone outlet along with required documents. ... 
Step 5: Your New Vodafone Prepaid Sim will be activated within 48 hours.