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What code do I need: PAC or PUK

by on ‎02-10-2017 15:37 - last edited on ‎02-10-2017 16:25 by Community Manager (49,709 Views)

One of the many questions on here is about PAC or PUK codes, but there is a lot of confusion over which code is actually needed.

So, here is a (very) short guide about them.

A PAC code is a Port Authorisation Code. It is the code you need to give if you want to transfer your number from one network to another (say moving from Vodafone to o2).

A PUK code is an Pin UnblocKing code. You need this if you have entered the wrong PIN code too many times and you have locked your SIM card. This code will not unlock your phone to allow you to use a SIM from a different network. If that is what you are after, you will need to follow the below guide:


If you need to get your PAC code, you will need to call o2 Customer Services (CS).

  • If you pay monthly (PAYM) for a refresh, SIM only or standard contract you need to call 202 or use live chat.
  • If you are a pay as you go (PAYG) customer then you need to call 4445.

If you need your PUK code, you can find this:

You only have so many attempts to enter a PUK code. Get it wrong too often (normally 3 times) and you will permantly lock your phone. Please be careful!


If you have any questions then please post on here - but remember, this is a public forum so do not post any personal details (contact number, home address, etc), and we are not customer services so anything account specific we will not be able to help.

on ‎02-10-2017 15:52
Good job.
Needed doing.
on ‎02-10-2017 15:54

Thanks a lot @gmarkj Fantastic

by Anonymous
on ‎02-10-2017 16:07

Nice work @gmarkj

by Community Manager
on ‎02-10-2017 16:12

@gmarkj great work bud smiley I'll get this moved over to the knowledge base. 

on ‎02-10-2017 16:27

Good simple and straightforward... 😀

on ‎02-10-2017 16:50

Good job. Just what we needed Smiley Wink

on ‎03-10-2017 10:21

Awesome, thanks for this @gmarkjsmiley

on ‎04-10-2017 00:19

Proper pukka, that post! Smiley Happy 

on ‎01-11-2020 22:18

Good evening,


owing to my husband not knowing the above, my Samsung S7 is asking for a SIM network PUK.  Can anyone help?

on ‎02-11-2020 10:56

If you have switched away from o2 (so the phone was originally purchased on the o2 network) you need to call o2 customer services.

If you have joined o2 (so the phone was originally purchased on a different network) you need to contact the other network's customer services.