Summary:
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The Nintendo Switch 2 requires a mandatory day-one update to enable core functionalities, including backward compatibility.
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Without this update, users cannot access Nintendo Switch Online, the eShop, or play most digital and physical games.
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The update also enables support for microSD Express cards, Game-Key Cards, and the new GameChat feature
As the Nintendo Switch 2 launches on June 5, 2025, users must perform a mandatory day-one update to unlock essential features. This update is critical for accessing backward compatibility, online services, and other core functionalities. Failure to install the update will significantly limit the console’s capabilities.
What Features Are Unlocked by the Nintendo Switch 2 Day-One Update?

The day-one update, version 20.1.1, is crucial for enabling several key features on the Nintendo Switch 2:
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Backward Compatibility: Allows users to play most Nintendo Switch 1 games, both physical and digital.
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Nintendo Switch Online Access: Enables online multiplayer, cloud saves, and access to classic game libraries.
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Nintendo eShop: Provides access to purchase and download digital games and content.
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Game-Key Card Support: Activates functionality for physical game cards that require a digital download to play.
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MicroSD Express Card Support: Allows the use of high-speed microSD Express cards for additional storage.
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GameChat Feature: Introduces a new communication tool for voice and video chats during gameplay.
Without this update, users will be restricted to playing only certain physical Switch 2 games that contain all necessary data on the cartridge.
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How Does the Update Affect Backward Compatibility and Game Access?

The Nintendo Switch 2’s backward compatibility is heavily reliant on the day-one update:
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Game Compatibility: While most first-party titles are compatible, some third-party games may experience issues or require updates to function properly.
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Accessory Support: Certain games that depend on original Switch accessories, like the Joy-Con’s IR sensor, may not be fully compatible with the new Joy-Con 2 controllers.
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Data Transfer: The update facilitates the transfer of user data and game saves from the original Switch to the Switch 2.
It’s important to note that some games may require additional patches post-launch to ensure full compatibility with the new hardware.
Source: Polygon
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