I got a new SIM card. Since then, "Telekom.de | mobilcom-de…" has always been displayed in this notification line at the top (see picture). As a result, however, the small notification symbols are no longer displayed because the line is already full. I don't think that's possible, but can you somehow disable that from being shown to one of the providers all the time?
By the way, I have a Huawei P Smart.
Thank you for your answers! 🙃
I also have Huawei
So 1. Settings
2. Display and brightness
3. Further display settings
4. Network operator names to OFF
Great, it worked!