A porting authorisation code, or PAC code, allows you to transfer your existing mobile phone number from one mobile phone network provider to another mobile phone provider so that if you change mobile phone networks you do not have to give everyone a new number You can keep your existing mobile phone number. Porting Authorisation Code. Porting Authorization Code ( PAC) is a unique identifier (normally 9 characters long and in the format "ABC123456") used by some mobile network operators to facilitate mobile number portability (MNP). This allows users to retain their mobile telephone number when switching operators. To request your PAC code online, simply log in to your Vodafone account and navigate to the "My Products and Services" page. From there, select the "Manage my account" option, and then select the "Request a PAC code" option. Alternatively, you can call Vodafone customer service on 191 from your Vodafone mobile, or 03333040191 from any other phone. Unfortunately, if you did not ask for the number to be put on PAYG or ask for a PAC code and moved the number to another provider, it will be lost. If you had asked for a PAC code and not used the code to move the number, it would have overridden the cancellation request and the number would still be on Vodafone and charged. Online: You can get a PAC Code from Vodafone by logging in to the My Vodafone website, Once you’ve logged in, go to Account settings > Mobile switching, By Text Message: You can get a Vodafone PAC Code sent to you via SMS text message. Text PAC to 65075 to receive a PAC Code from Vodafone. By Phone: You can get a PAC Code by calling Vodafone. Call your current provider and ask for your Porting Authorisation Code (PAC code). Get your Lyca Mobile SIM Fill our Online Porting Form and your existing mobile number will be replaced on your Lyca Mobile SIM within 2 working days. Please note: Lyca Mobile has porting arrangements established with the majority of UK mobile network providers If you prefer to request your PAC code by phone, you can call Vodafone's customer service team on 191 from your Vodafone phone When you speak to a representative, simply request your PAC code and All you need to do is get what's called a PAC code (Porting Authorisation Code) from your existing provider. Vodafone. Ring 191 from a Vodafone phone. Ring 033 3304 0191 from any other phone A011.