Use the correct key or access method for that lock
If it is a privacy lock with an emergency release hole, insert the proper release tool or a straightened paperclip
Push the tool straight into the hole until it engages the release mechanism
Turn the tool gently if the lock requires rotation
If it is a deadbolt or keyed lock, use the matching key from the outside
If the lock is jammed, try lubricating the mechanism with graphite or lock lubricant
If the door is stuck, apply gentle pressure while turning the handle or key
If you are locked out, contact the property owner, building manager, or a licensed locksmith
If there is an emergency, call local emergency services