Anything better than MintSim?
Depends. Do you actually need "unlimited" talk and text and 10GB of mobile data between the two of you, or do you just
think you use a lot and waste a lot of time and mobile data for dopamine fixes and boredom alleviation? What sort of priorities do you have beyond just the cheapest, belt-busting-est, all-you-can-eat mobile plan you can get your hands on?
Potentially, there's cheaper and superior options if you actually shop for and pay for what you
need as opposed to simply letting bulk volume for the money dictate what you want.
Maybe give the guide linked in the sigline a read.