on 10-04-2020 19:12
on 10-04-2020 19:17
If you upgrade you have to change tariff
Any discount would have to be applied for again @Rachieroo1
on 10-04-2020 19:18
Your tariff will more than likely have to change as all Refresh deals are now on Custom plan giving you the freedom to choose what best suits your needs. To re-add your O2 open discount after you've upgraded visit o2.co.uk/open Guide: O2 Open & Friends and Family discounts - How to sign up although i believe the discount it now 25% off of your airtime bill.
Hope this helps