hey, you should look into keitais/garahos! funny enough I just posted a forum asking if anyone else here likes them. they're basically little Japanese flip phones that support 4G and run a pretty simple Android install, usually Android 5, 8, or 10. I daily drive a Sharp Aquos 806SH - probably the prettiest phone ever made tbh
they don't work everywhere tho. they use specific Japanese bands (the frequency channels used for cell phone services), meaning support rlly depends on both where you live and what carrier you're with - you'll likely have to get a new SIM with someone else.
but it is super rewarding imo! these phones feel trapped in 2007 despite running Android, I love them sm
feel free to hmu if you need advice!! :3