I can't keep my old number without the sim serial number that's on the back of the sim pack, so how do I bring my old number over to my Vodafone sim card without that serial number.?
So it sounds like you do not want to do a SIM Swap. but you want to port your old number in from another carrier is that correct?
If so why can you not provide the SIM Serial Number? Remove the SIM Card from your phone and it will be written on the back of it...
If you can't read it because it's been damaged or cut or something, just call your carrier and ask for the SIM Serial number.. They will be able to provide you with it.