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Update README.md
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@@ -135,7 +135,7 @@ As of the latest update (release 3.1 and newer) , the firmware now supports **Un
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- Any valid UTF-8 encoded character
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This change improves flexibility and supports international users while preserving PIN format validation and complexity checks. PIN complexity is still enforced.
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The relevant PIN validation logic in [`CustomFunction.java`](https://github.com/token2/pin_plus_firmware/blob/e0ed38efa0f4afd90566a78645e5f699f6980d51/src/CustomFunction.java#L5) has been updated accordingly to handle UTF-8 encoded input and detect character types using Unicode-aware methods.
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The relevant PIN validation logic in [`CustomFunction.java`](https://github.com/token2/pin_plus_firmware/blob/e0ed38efa0f4afd90566a78645e5f699f6980d51/src/CustomFunction.java#L5) has been updated accordingly ( any non-ASCII characters are treated as their own class ).
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> **Note:** PINs are now interpreted as UTF-8 encoded byte arrays internally.
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