With the many 365 days deal, they seem to be the most cost effective.
I just was wondering how you limit your data usage to the monthly allocation. Say you get 180gb per year on Woolworths mobile, how do you limit that to 15gb per month? I am aware on android there is a way to limit data usage per month, but it does not appear to be an option on iOS.
Maybe use WiFi when available? ¯_(ツ)_/¯