PS4 Firmware Update 5.50 First Look: What's New? | PlayStation 4 - YouTube
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PS4 5.55 System Software UPDATE DETAILS - YouTube
Actualización 5.55 del sistema de PS4 ya disponible | Hobby Consolas
Sony lança update 5.55 para PS4; sabia mais
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PS4 5.55 Update Is Out Now (And It Doesn't Do Much) - GameSpot