Each person uses different amounts of data each month, but you can decide exactly how much data you need by first checking your data usage in your phone settings. For iPhone users, go to Settings, click Cellular, and look at Current Period to determine how much data you've used since your last data reset. You can also see how much data each app uses. And for Android users, open Settings, go to Network & Internet, and you'll find your total data use under the Mobile tab. You can explore more detailed graphs of your data usage under Mobile data usage. And if, for some reason, you don't have any data usage records to use as a starting point, the average data usage is around 15–20 GB. According to research from Ericsson.com, the global average data usage per month for smartphone users is anticipated to be 19 GB in 2023 and even reach 46 GB by 2028.