If I don't have a NRIC can I apply for a Zero 1 mobile plan ?

Can't if can use fin number

Actually you can!

How I did it without an IC...

1. Go to Zero1 website, create an account (name, email address, password)

2. Click "The Plan" on top of the page, select "Give me a New Number" and there's a list of numbers for you to choose from

3. Once you've chosen a number, proceed to "Order Summary"

4. Key in credit card details, agreeing to monthly auto-deduction then you're off to go!

Hope the above helps a little! :)