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My Xperia X phone has been off for a while now I've turned it on again, I'm being asked for a password, except I never put a password. There is no sim card inside.
So sorry for you but lost pin means lost entrance.
Best thing you can hope for is that you did automatic backup of your pictures to Google or Microsoft.
In that case they are not gone, just in the cloud.
Next phone accept the choice of automatic backup or store your pictures on SD card.