JPack
macrumors P6
As BorisDG noted in the 13th post, the charges in the NAND will have depleted by the time 2276.
But I wonder if Apple has done something special for this iPhone and built a custom hard-coded substitute storage chip that needs no power.
It's not important because shops today upgrade NAND on iPhones all the time. People buy 256GB and shops upgrade to 2TB. You just need to restore the IPSW to blank NAND after the upgrade.
The issue is the lack of activation servers 250 years from now. But quantum computing will easily bypass that.