iPhone dropping Wi-Fi? Software update causing unwanted changes to settings (in this case turning off Wi-Fi Auto-Join) may be the reason
It seems that after an iPhone software update, some settings revert to undesired options. This can cause major problems. For example, after a recent iOS update, the Auto-Join Wi-Fi setting was turned off, unbeknownst to me. (Settings > Wi-Fi > click selected network > Auto-Join)
The phone would drop my network Wi-Fi when not being used and revert to cellular. This caused massive data usage carnage overnight, while I slept, to the extent that my existing 2 GB data plus another amount to the tune of a $30 penalty was gone by morning! I have noticed on occasion that other settings mysteriously change unbidden - not sure if it is only after updates. This has to stop.
Can Apple please prevent this from happening? These days there are many, many settings to consider and it is unreasonable that after software updates or periodically to have to check to ensure they haven't been changed by the system.
In a previous post I had asked why my iPhone was dropping Wi-Fi - well, it turned out the above was the reason. Auto-Join had been shut down without my permission or knowledge, apparently after an update. People should consider that as a possible cause when trying to determine why their iPhone is dropping Wi-Fi.
iPhone SE (3rd generation)
