Welcome to Vodafone Community
How can I get rid of the "Data usage warning" triangle at the top of the screen, or the message in a bar across the screen on switching on. I've gone into Settings then Data usage but there doesn't seem to be a way to switch it off - I'm not even sure how it got to come on, it only happened recently.
As far as I'm aware there are a couple of ways to have warnings on Data usage.
On Android phones a person can usually set a warning slider level and data refresh date. There may also be relevant preference settings in the phone.
Which phone make and model are you currently using ?
In your online MyVodafone a person can set a cap on the newer tariffs.
Link > Data-capping <
Current Phone >
Samsung Z Fold³ 5G.
Previous Phone >
Samsung Note 20 Ultra 5G - SM9860.
If you pull the notification blind down, does the warning expand there? If so, tap on it and it should take you to the source - and you should find the way to adjust the level there. If it's not the system data monitor but a 3rd party app, as well as a level setting, look for a "persistent notification" tick-box. I had something similar that bugged me for months until I found that!