Setting up an account is one thing. Funding a wallet is another. To fund you need to provide Thai identification. From GRAB's site:
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How do I complete my identity verification
To ensure successful verification of your identity, please ensure that:
The image of your ID card is clear and readable, with all corners visible. It should be an image of the original card and not an image of a scanned copy.
Your entire face is visible when capturing the selfie, with you looking directly to the camera. Remove masks or any other accessories such as glasses from your face.
The name and ID number must match exactly as the uploaded images of the ID card.
Note: The above feature is available only for Thai citizens.
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So back to my original question. How do you fund a GRAB account so you can paid for a GRAB ride? The question is directed to Non-Thais (fellow farangs) who have done this before.