When you have collected enough destination keys you can unlock new air lines as arrivals, but only the green ones. How do you unlock the blue ones?
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The green is unlocked. Tap on a blue one to unlock it.
Quite the opposite actually
@FulltOs the blue is already unlocked, the green is for you to unlock so the blue is something you shouldn’t worry about, as I said, already unlocked
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Of course. Now I feel a bit stupid. Thank you for your kind replies.