When I reboot my phone, I always get this message from Android:
Your number: +XX XXX XXXX XXXX
I'm on Android 9. How can I disable it? (I'm not changing SIMs or something, just plain reboot.) To clarify, this is not the usual notification that you get from other apps, but a simple popup (from the SIM card I presume). There is only one SIM card slot.