If you're changing the frequency of your subscription (regardless of whether they are also changing plans at the same time) the billing will take effect immediately.
Your prior subscription will be cancelled, and a new one created and charged.
Promo Codes, account balances and other Discounts will be lost and won't be transferred to the new subscription. You will need to contact us to reactivate your promo code on the new billing frequency.
The standard discounts of yearly subscription will apply if the user is switching to a yearly plan.
To switch your plan frequency