Virgin media -> 02. No way to identify Sim?

[Anbidian]

A long shot for anyone who may know. My wife has received a sim card from 02 to change with her Virgin media sim. One big problem though... she has 3 Sims with Virgin, 1 is destroyed (still being payed), two are still completely functional and working. there is seemingly no way to identify which phone number this sim is supposed to be for. When another two of these sims arrive with no explanation to which is which its going to be a bit of a nightmare. why is the phone number not just mentioned on the letter...would be handy. Also her virgin media online account details are not recognised on the my02 app... so thats frustrating too. Any one know if there is a way to tell which sim is which ?

[MI5 · Accepted solution]

@Anbidian 

How to find your number here Guide: How do I find my own mobile number? 

Or contact O2 and give them the serial number off the sim Guide: How to find help & contact O2