Why will the key not unlock the door? If you are using the correct key it should unlock the door. Try both doors. If it will not work you need to call a locksmith to come and unlock the car door with a slim jim.
You use your key to unlock the door. Then it will be open. If not, a locksmith can help.
Unlock it from inside the car with the door lock.
Go in from another door and open it from the inside.
Use the key to open the door.
Unlock and open the door.
use the passenger door.
Push the open button twice in quick succession, this should open the rest of the doors
Key will turn but door won't unlatch to open.
Insert key in the door lock and turn to unlock the door.
On my '02' Expedition the rear actuator went up leaving the door stuck in the locked position, the key nor the key fob would unlock the door. I had to get a locksmith to unlock the door to get the rear panel off then take it in to get the actuator replaced. If this is your problem then if you get a locksmith to unlock the rear door, make sure you take the panel off so you can unlock it from inside.