Word is the latest update is going g to block EBS signal. Turning off auto update is NOT enough! It appears that the update downloads to your phone first, but then doesn’t install for a few days, hence why some people are still getting notifications that their phone is going to update soon. If the update has been downloaded to your phone already, you have to turn off auto updates AND delete the update from your phone.

Go to: SETTINGS > GENERAL > IPHONE STORAGE and scroll down to find the 14.3 update. Delete it.

UPDATE: Sorry, I should clarify above: if you turn off your automatic updates too late, the update could already be downloaded on your phone, and will install within the next couple days. So if you are just now turning off auto updates, the update may have already downloaded and now you to delete it before it actually updates your phone’s iOS.