Today there is Marc Jacobs Highliner up for grabs with O2! You will just need to be on the O2 network if you're not then you can get a free sim card here. Then, simply download or login to the O2 Priority app to get yours.
To claim yours click 'GET FREEBIE' or search for the offer on your O2 Priority app. Then head to your local Harvey Nichols store and click the 'use now' button on the app.
You must have the o2 Priority app to use this offer, and they are subject to availability.