The honest answer is: I don't know. Yesterday, all BPI branches were OFF. All banking transactions were halted starting around 9AM. I was able to do my banking activity around 5PM already. When I asked the clerk how long does it usually take to restore their system, she just simply said, she don't know because it varies from case to case.
Yesterday's incident may or may not be related to today's offline mode but it is safe to assume that it won't be restored as quickly as we think it is.
If you really have urgent banking needs today, you are advised to call BPI Customer service numbers:
For Metro Manila: 89-100
Domestic Toll Free: 1-800-188-89100
International Access: 63-2-89-10000
But I tell you, the line is so busy!