I'm just about to have to buy a new phone, as my Telco is switching off 2G, and my present antique phone won't accept 3G ( or 4G )
ExSp33db1rd, you can get a 3G Nokia 3310 in NZ for $99 (only available with Spark though).
https://www.stuff.co.nz/technology/g...-not-practical
Or a basic smartphone that has 3G + 4G,as you wish