Many iPhone 13 owners, including me, have run into a problem that prevents them from enabling Unlock with Apple Watch. That feature automatically unlocks your iPhone using your watch if wearing a mask prevents Face ID from recognizing you.
After I migrated from my iPhone 11 Pro to my new iPhone 13 Pro, Settings > Face ID & Passcode > Unlock with Apple Watch was disabled. When I tried to enable it, I got an “Unable to Communicate with Apple Watch” error. Boo!
Apple has acknowledged the problem and promises a fix in an upcoming software update. It will be welcome—the Unlock with Apple Watch feature is a godsend when wearing a mask in public situations, something that’s once again a necessary precaution even for those who are fully vaccinated.