Different sim required in new phone

[#1]

I have just bought a new Motorola phone as my old one is very short on memory. Thought it would just be a matter of swap my sim card and away we go. The new phone uses a nano sim. I have ordered a new SIM from Giffgaff to fit my new phone. But I want to keep my original Giffgaff number. I have had a look at the SIM swap guide but really am none the wiser! For example what is "activation code on old SIM"? Do I just put the new SIM in my new phone and off I go? I think not! Do I put the new SIM in my old phone first (if it fits)? It doesn't take a lot to confuse me these days. I have no idea if I have an active PAC code either, certainly never asked for one. Any help would be much appreciated!

[#2]

Hello @kevinjenks & welcome to the giffgaff Community
Once you have the SIM you will need to perform the SIM Swap. Carrying out the SIM swap will transfer your current number, airtime credit and/or bundle (goodybag) over to new SIM. The SIM swap should take no more than 30 minutes to complete and can be performed any time between 4.30am and 9.30pm.

Please check out this http://community.giffgaff.com/t5/Using-giffgaff/What-is-SIM-Swap/ta-p/7320084 guide on how to perform a SIM swap or you can follow the video tutorial here https://www.youtube.com/watch?v=5RWpzgyZU-A from member flaxvert.

[#3]

@kevinjenks
You don't need a PAC code to swap your number to new sim.
You can do a SIM swap http://community.giffgaff.com/t5/Using-giffgaff/What-is-SIM-Swap/ta-p/7320084
Just follow the the guide or you can see the video.

[#4]

Thanks for the replies. I've ordered a new SIM which should be here tomorrow hopefully, so I'll have a go at it later this week! 

[#5]

All sorted thank you very much. Received my new SIM on Tuesday but waited until this morning as I had more time. Setting the phone up was easy enough, android to android. So I just followed the instructions and it moved everything over. Once done I logged onto Giffgaff and followed the instructions for swapping SIM. Took about 30 minutes or so to go through. I saw that my old SIM was no longer working and neither was the new one!!! Eeek! So the good old "switch off new phone and switch back on" routine was employed and all was good! I'm knocking 60 now and whilst I'm not a technophobe, I find things are changing very quickly!!! So nice to know that there's help out there!