You'll know the promo is already active upon your first data usage because you’ll receive a notification to signify that the promo has started. You'll also receive pre-expiry notifications before the end of your GoRoam validity. Lastly, you’ll receive a final notification that your promo is already expired.
Postpaid customers who keep their data roaming on after their GoRoam expires and don’t register to the same or a different promo will be charged the default rate of P399/24 hours.
On the other hand, prepaid customers won’t be able to browse without any data roaming promo.