It's hard to tell without having physical access to the device whether it's compromised or not (it's hard to tell even when you do have physical access).
I recommended Signal ease your paranoia. If you want to be extra sure and have the means to do it: never hurts to switch to a brand new phone either.
I recommended Signal ease your paranoia. If you want to be extra sure and have the means to do it: never hurts to switch to a brand new phone either.