An important courtesy reminder for the jailbreak community: Sunday, March 13th at 00:00 P.M. UTC (7:00 P.M. EST) is the hard deadline for using the DelayOTA method to upgrade to the unsigned iOS or iPadOS 15.1 or 15.1.1 firmware.
If you followed either of our tutorials for using DelayOTA on a jailbroken or non-jailbroken handset to upgrade to an unsigned firmware within the 90-day grace period, then you might be left wondering how you can remove the unsightly “This iPhone is supervised and managed by [insert name here]” spiel that appears at the top of your Settings app.
It’s not uncommon for people to lose their jailbreaks, and as we always say, those who aren’t jailbroken should always stay on the lowest possible firmware to ensure jailbreak eligibility. This is good in practice, but sometimes jailbreaks drop for newer versions of iOS or iPadOS than what you’re currently running, and when Apple stops signing that newer firmware, you might not be able to update to it before jailbreaking.
Prospective jailbreakers often cling to the lowest possible firmware to cement their jailbreak eligibility in the future, sometimes only to find that a new jailbreak release supports a newer version of iOS or iPadOS that they refrained from updating to.