Linking another phone to my account for 20% discount

[SFR]

I had a pop up when in my account changing tariff saying that if I linked another account to mine, there would be a 20% reduction. After I'd changed my tariff, this area could not be located again. Where do I find it ? 

[Cleoriff]

@SFR 

Log into your My O2 http://www.o2.co.uk/myo2 and you will see the option MORE. Click on that and you will see PERSONAL DETAILS

Enter the security code sent to your phone on the next page then select "My O2 products and services"

Bring in other products is on the right of the next page.

Give O2 a call on 202  or 0344 809 0202 (Contract) 4445 or 0344 809 222 (PAYG)

Or you can message O2 on Facebook ( https://o2uk.co/O2CFB) , Twitter ( https://o2uk.co/O2CTW) or Instagram ( https://o2uk.co/O2CIG), hopefully they should be able to help.

[MI5 · Accepted solution]

@SFR 

You need to purchase an additional contract to benefit from a multisave discount.

How to claim discount here:

https://www.o2.co.uk/multisave