Just let the battery drain. <a href="http:&#x2F;&#x2F;arstechnica.com&#x2F;apple&#x2F;2016&#x2F;02&#x2F;64-bit-iphones-and-ipads-get-stuck-in-a-loop-when-set-to-january-1-1970&#x2F;" rel="nofollow">http:&#x2F;&#x2F;arstechnica.com&#x2F;apple&#x2F;2016&#x2F;02&#x2F;64-bit-iphones-and-ipad...</a>