is there a mobile phone OS besides iOS, Android, and Windows that can be used on a cheap device for basic purposes like making calls and texting?
Symbian?
>>58825031
something that wasn't discontinued years ago, preferably
>>58825039
No, there was the Nokia asha platform before it was killed by M$.
Just get a dumbphone out of your drawer, no need to worry about OS.
You're probably just better of buying an old "dumb" phone with a hardware keyboard.
Jolla/Sailfish OS
Canonical/Ubuntu.
>>58825001
WebOS