I'm going to block a friend of 3 yrs because they got mad I stopped talking to them for a day
Why would you go to the extreme by blocking them?
They are just too jealous of me, I just don't want them to be part of my life
You're free to choose your friends. If you think they're being too jealous and toxic, it's ok to end the friendship.
My phone isn't working properly anyway, so I don't mind if they come back or not.
It doesn't feel like there is anything wrong to block someone who you're not getting along with. It will be healthy for both of you to move on.