LOL. Not my idea of reducing data use, if you get cut off part way through the month.
how about making your phone use data more wisely.
on iphone it's pretty easy.
open setting. Select cellular data. Scroll down to see the list of apps, according to most data used.
you notice a switch on the right of each app, and also the amount each app has used.
non essential apps can have the switch turned off.
s.some apps will not have a switch because they must be turned off within the app. Email, social media, YouTube and others can have video restricted to wifi. They can have limited notifications and refresh times.
if any apps have high use and you aren't sure how to limit, post the info and I will help.