What could trigger low *data* mode on a iPhone besides the manual switch? Something is enabling low data mode on wifi on my iPhone(s) from time to time. I usually only notice when I see apps not updating or when I install or want to update an app. It then asks &quot;Are you sure because of xx MB?&quot;.
I use (automated) shortcuts in my daily life, but low data mode isn't even an option via shortcuts, only low power mode, which does not trigger low data mode switch inside the wifi profile. My shortcuts do control airplane mode and wifi switch, but I am at loss how any combo's of that could result in low data mode.
Qv1: Does anyone have any idea what could enable wifi low data mode (besides the manual switch inside a wifi profile)?
Additional remarks:

low data mode is also a switch somewhere under mobile data, this question is not about that switch; only the wifi variant.)
low power mode is not active when I encounter this state so the battery icon is green.

Additional remarks added after comments and time:

Wifi profiles are synced accross devices, iPhones and Macs. (Thanks jksoegaard.)
I disabled the checkbox 'Connect automatically...' for most Wifi networks inside the Mac settings because I do not want the Mac connecting to Wifi networks automatically. (It is connected via Cable.)
Due to unclear circumstances I had to uncheck all the checkboxes again, it seemed to have forgotten my preferences.
Later on, I encountered my phone in low data mode again.

The evolved question:
If there is a true causality, I don't know for sure; might be a coincidence. I can only guess on what caused the Mac (wifi) setting's amnesia, so I cannot reproduce it.
Qv2: Could you somehow unintentionally cause low data mode (inside wifi profiles) on your iPhone by changing settings on your Mac related to the same wifi profile?
(Low data mode does not exist on MacOS wifi profile as far as I know.)
In regards to my comment, triggering off low data mode for Wifi.

Wifi Low Data Mode

To turn off WiFi low data mode regarding your Wifi connection, instead of cellular low data mode. This should not interfere when you change your cellular connection to low data mode.

Step 1: Open Settings and go to Wi-Fi.
Step 2: Tap the name of your WiFi network.
Step 3: Enable or Disable Low Data Mode

Suggestions: Update to the latest operating system, as well.

You might also notice that sometimes applications will not be allowed to refresh their data in the background, and FaceTime calls as an example are not the same quality as they normally would be. The same goes for streaming video, as well.

Enable Or Disable Low Data Mode For Celluar


Step 1: Open the Settings app and go to Cellular Data &gt; Cellular Data Options.

Step 2: Enable or Disable Low Data Mode.

Step 3: Might be Celluar Roaming