I use a Nokia 100.
https://en.wikipedia.org/wiki/Nokia_100
Have done for years.
This is not privacy oriented with respect to voice and SMS but it has no internet or GPS.
There are a few bugs and disadvantages, but I put up with them.
Sometimes if you drop the phone it will not receive calls or texts until you restart it. It fails silently so you don't know there is a problem until you restart the phone and the voicemails and texts start to come in.
It only holds a few hundred texts before it gets full and you have to start deleting them. When it gets full it silently rejects new texts until you deal with the inbox. This can be a real nuisance because you miss messages. When it gets nearly full sometimes it will give you the wrong text. Person a texts you and it gives you an out of date previous text by the same person and you have to delete a few texts and ask them to re-send.
They do wear out over a couple of years, the screen connectors fail and the SIM card socket goes slack with everyday knocks.
When you get them second hand, they can be hard to unlock from the old network. Only get the right network or an unlocked handset.
I use a Nokia 100.
https://en.wikipedia.org/wiki/Nokia_100
Have done for years.
There are a few bugs and disadvantages, but I put up with them.
Sometimes if you drop the phone it will not receive calls or texts until you restart it. It fails silently so you don't know there is a problem until you restart the phone and the voicemails and texts start to come in.
It only holds a few hundred texts before it gets full and you have to start deleting them. When it gets full it silently rejects new texts until you deal with the inbox. This can be a real nuisance because you miss messages. When it gets nearly full sometimes it will give you the wrong text. Person a texts you and it gives you an out of date previous text by the same person and you have to delete a few texts and ask them to re-send.
They do wear out over a couple of years, the screen connectors fail and the SIM card socket goes slack with everyday knocks.
When you get them second hand, they can be hard to unlock from the old network. Only get the right network or an unlocked handset.