[nisse72]

For about $50 you can (still) get a Nokia 3310.

[dehrmann]

Be careful with this. AT&T shut down its GSM network 3 years ago. The ~only unlocked LTE feature phone I could find a year or two ago for my grandma (who wouldn't be able to learn how to use a smartphone) was an Alcatel Flip 2.

[Hamuko]

There's a 3G variant of the Nokia.

[ebg13]

It still uses 900/1800MHz, so it won't work in the US.

[paulcarroty]

3G was deprecated by many networks too(hello, Verizon).