Could your carrier have added it depending on phone plan?
Some prepaid people with a set amount of minutes and data have been upset since nothing really shows usage.
You have to dial #x# to see how many minutes or data you have left with TMO. ATT did have an averaging list of usage on their web site.
My phone will let me block data after a certain amount. We have one phone that is usually sold by carrier for prepaid. However, I have a postpaid account, and nothing shows on that phone since it's a flip. If it did, the Vulcan would have a cow and I'd hear about it.
Yeh, could be a carrier thing. I remember seeing something like this with O2 UK, when I was using a pre-paid SIM with a Samsung phone, in 2013. And it was how much credit or minutes got left for each call. I've also used the same phone with other carriers in other countries, and it didn't happen at all.
If indeed it is something to do with the carrier, then presumably there's a way to turn it off, but you'd have to check with the carrier for that.
Who is the carrier and what country?
It's not a regular Android toast notification, it's a box you have to
close before you can do anything else, I was only using O2 for a couple of weeks while I was in the UK, so didn't bother me at the time. And as make the call, this thing pops up.
Different carriers have various methods for showing you the amount of credit or minutes you have, but usually it involves you having to do something, like sending a code, SIM-toolkit, on-line, etc, and it isn't automatic.
For the OP, it isn't about how much credit or minutes got left, but it looks very much like the same thing I saw with O2.
