I updated my iPhone 6s from IOS 9 to IOS 12 (yes I know...) and I had some issues in the Settings->Cellular menu. I looked around online and I understand that IOS11 introduced a feature unique to T-Mobile connected iPhones that shows cellular data usage, by billing cycle. The Cellular Data field is supposed to have tabs for "This Billing Period" and "Previous Billing Period" with data used by each app for the given billing period.
However, my phone only has one tab ("This Billing Period") and is apparently showing data usage from when I first got the phone 3 years ago. You can see I only used 244mb this billing period:
https://imgur.com/a/L9AE9TY
Does anyone know how to fix this? Will it resolve itself when my next billing cycle begins, or do I need to do something else? Resetting network settings and resetting all settings did not change anything.
However, my phone only has one tab ("This Billing Period") and is apparently showing data usage from when I first got the phone 3 years ago. You can see I only used 244mb this billing period:
https://imgur.com/a/L9AE9TY
Does anyone know how to fix this? Will it resolve itself when my next billing cycle begins, or do I need to do something else? Resetting network settings and resetting all settings did not change anything.
