Cellular usage on iPhone 15 is massively incorrect

I’ve had my iPhone 15 for 10 days and it says I’ve used 31 gigs of data.

last month on my older phone, through the entire month I used 21gigs.

i don’t have unlimited data without slowed service speeds.

i don’t understand this. I completely agree with the comment above. There are apps here I haven’t opened since I got the phone 10 days ago and there is data used. What is this nonsense.

Please help, anyone with advice??

Some cellular carriers do reset the statistics per billing period; others do not and the period is then since you last reset your cellular statistics manually.

If you go to Settings -> Cellular and scroll all the way to the bottom of the page, you will see the option to Reset Statistics and the last time the statistics were, in fact, reset.

On my phone with AT&T they reflect my usage since February 5, 2020.

That is what it is for, if the user decides they wish to double-check against their carrier. If you wish to do that, reset your settings the day that your billing period closes with the carrier. Most carriers have apps provided as well that will provide you with those statistics from your billing cycle.

That section on your phone does not reset with your billing cycle. Those numbers could be from when you first started using the phone.

~Lyssa

"Current period" references today back to whenever you last reset the statistics. If you scroll to the bottom of that section, you should see when they were last reset. Mine shows "Last reset: Jun 6, 2023"

If you restored this phone from a backup of a previous phone, the statistics carry over.

~Lyssa

I had no idea some carriers DO reset those numbers. I've had AT&T and Mint Mobile, and neither of them resets this section. I can check my data in their app/website, and I don't rely on my phone.

Glad you got answers!

~Lyssa