After putting my iPhone in lockdown mode > disconnecting my ATT fiber PON (leaving the router on) > going to WiFi settings in iOS > disabling Connectivity Assist and crucially > “Reset Data Usage”, iOS informed me that my certificate expired in May of 2025. The “common name” was set to ‘dsldevice.domain_not_set.invalid’, which lead me to the above link.
After putting my iPhone in lockdown mode > disconnecting my ATT fiber PON (leaving the router on) > going to WiFi settings in iOS > disabling Connectivity Assist and crucially > “Reset Data Usage”, iOS informed me that my certificate expired in May of 2025. The “common name” was set to ‘dsldevice.domain_not_set.invalid’, which lead me to the above link.