Can you share more details please? This might be really beneficial for other users. Did you manage to get it authorised in the end?
We know that Uber is a bit of a hit and miss.
I canāt really tell if itās applicable to Grab, but there were cases where prepaid card type was an issue for some merchants, sometimes additionally combined with attempt to make offline transaction. Knowing what problems happened with āGrabā, can help us write better Wiki info for Malaysia in the future! 