maxis' bill is instantaneous same da, give or take.

Yup, I checked with them - they told me I contracted with them on October 7, 2021 so I can pre-order without needing to terminate my contract first. Let’s just hope the pre-order goes smoothly (but I doubt it will).

My billing cycle is every 10th of the month, you’ll get a notification on the billing day itself but the bill is usually only available on the next day or a couple of days after that.