You may not have many options available since some companies do no provide service in certain locations or buildings.

My question is do you really need unlimited internet? If you are not downloading massive amounts of data then one of the cap plans may be enough. For example I have a around 1000gigs plan and I never ran into issues. This includes lots of streaming and working from home. Just a thought.

Finally can you just change the name in the plan to you to still keep it and be grandfather into the unlimited? That may be an option