Login With L-Key
Once TLT Android APK is installed and your L-Key is generated, go ahead and open it up. It will have an update automatically.
Once the update is completed, you are directed to the game login home page as shown below.
Go back to your LL app and find your L-Key. Copy it.
Paste the L-Key in the login window and hit the "login" button.
There you go, logged in and ready to play!