Yes, you can subscribe to several Ubigi Monthly Plan at the same time.
In this case, each one of those data plans may have:
– a different renewal date: the renewal date is always the same day in the month as the date when you subscribed to the Ubigi Monthly Plan
– a different credit card for the monthly payment: during the subscription process, you can choose the same or a different credit card for each Ubigi Monthly Plan you subscribe to.