Had anyone notice that if you tell your follower to wait near a locked door (Or get them near the door) then walk up to them so they'll walk away from you, into the door, that they'll unlock the door for you?

I figured this out and it seem to work on all locks and even works on MOST (Not All) doors that Requires keys.

Supposedly you can just instruct them to open the door for you, although I prefer to level up lockpicking myself.

You can do that but they'll only unlock the low level doors. This glitch can make them unlock almost any locked door.