Additional SIM discount options for second SIM ?

[RDF]

Hi,

We were originally Virgin Mobile SIM customers as part of a Virgin Media broadband/phone / TV / mobile package.

Our two SIMs were in a family group (2nd SIM was about 50% off)

For tedious reasons, I won't waste your time with, we now have my SIM with unlimited everything as part of VM bundle and a completely separate second SIM-only monthly contract.

The VM > O2 move wasn't a smooth one.

Is there an O2 equivalent that works like the old VM deal? 

Multisave won't work as our second SIM contract is over 28 days old. 

Thanks.

[Enlli]

If over 28 days I think the only thing you will get is double data allowance on both phones

[MI5]

@RDF 

You'll get the volt benefits only now.

Volt Megaguide