Unless something has changed in Covid, they should definitely still work for everything. You can always have them reset at the front desk if they're glitching at the room door (that happens to us a lot on the first try of a new trip, but as soon as the front desk rezaps them, we're all good with no issues). But, make sure they are still active and attached to your account. You can check that by logging in. I'm not a fan of the phone option so we're still using MBs for everything. We find them super convenient. We'll be back in a couple of weeks and decided to purchase some of the newer ones with more designs.