If you are a vodafone customer and want to know�How to Activate Vodafone 3G then this post will be helpful for you. here we are sharing how you can activate 3G in your vodafone sim card.�To activate Vodafone 3G you only have to send a message from a 3G enabled handset with your Vodafone�prepaid/post paid. For prepaid and post for both are different method showing below so read carefully and do it yourself.