Insert the key into the lock and turn it.
Dead cell in the battery or something is on drawing power from the battery.
Check the battery cables. Make sure they are not loose.
If the battery goes dead flat the door will still unlock manually with the key.
Use the key to unlock it. The key is manually activated. Only the keyless entries will not work when the battery is dead.
Your battery is about dead .
Put the key in the door and turn.
Use jump leads from another vehicle or charge your battery on the car
use key to manually unlock. manual unlock will not work.
If you can not unlock them with a key, you will have to call a locksmith.
Unlock the door with your key.
By using your key to unlock the door.
By inserting the key in the door lock.