Just got this message for a new system update a little while ago. It is not the same update that came with the eshop not accepting cards anymore as I have already
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3DS System Update 11.16.0-49 Is Now Live, Here Are The Full Patch Notes | Nintendo Life
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Nintendo 3DS gets a new firmware update for version 11.14.0-46 | GBAtemp.net - The Independent Video Game Community
Help] My 3DS won't boot after system update | GBAtemp.net - The Independent Video Game Community
Help] My 3DS won't boot after system update | GBAtemp.net - The Independent Video Game Community
I install custom firmware (CFW) and repair Nintendo 3DS,2DS,DS, and DSi's : r/phclassifieds