Don't bother with Tourist sim
Bought a tourist sim in SG, being told it would work / carry my data allowance as roaming allowance in Malaysia. The second I touched down, I got a message saying that my registration had failed (it hadn't... I'd registered - and confirmed on line that it was already registered - to dags prior. And then I was abruptly cut off. No online chat working. No email to contact. No complaints shotline available. Not on a network anymore (thanks M1+...) so can't phone the hotline. Feels like a con.