I recommend Motorola flip phones, they look cartoony and have fun colors and designs and they still can email and text and call (this all depends on service provider)
Keep in mind that these phones only work with a few services. And may cost a lot bc they are old
Korea has a wide flip phone market still so Korean flip phones are also a good choice for not to much money. But they won’t be English and you need to jailbreak them to use them in English territories like America and all of Europe. So if you don’t want to do the work to use them you might not wanna get one. (I personally wouldn’t lol)
Motorola is #1 for flip phones in my opinion bc they jus work and look cute
Motorola V3 V3i is the best I’ve seen