I had Signal installed for a while, but ultimately removed it because it's mostly friends sending stupid memes, breaking whatever I was concentrating on seemingly at random. I do have it running on my laptop.

You know you can mute notifications and ignore until you decide to look into it?

I'm aware and I have. It's been helpful, but I tend to get into the habit of checking and messaging friends at random when I feel I feel slightly bored. Secondly, they'll often send me links and Youtube videos that I can't open. I'll likely reinstall it again in specific situations, like when I'm traveling abroad. Thirdly, the battery life on my phone lasts a few days without Signal running in the background. I've had the setup I have for about two months and it's working for me, at least right now.

Nokia has a model that works with WhatsApp.

Which model?

Nokia 6300 4G

Thanks! Will check it out. Whatsapp is a requisite comm tool for me and less-habit-forming compared with some other popular apps.