Safari crash on iPhone?
error400 iPhone 12 on safari
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What were you doing - or attempting to do - when you received the error? Have you tried using a different browser? That said, 'error 400' when it pertains to Web browsing is a 'bad request' error; this usually means that either you've mistyped the URL, or the URL is invalid (perhaps the site you're attempting to reach no longer exists). A bad request error could also occur if your browser is attempting to read info from an outdated cookie - try clearing your cookies (Settings > scroll down to 'Safari' > tap 'clear history and website data').
If none of that helps, please post back (to this thread) with more info. What version of iOS is your phone running?
