Wifi Speed reduced after iOS 15

Jaysheelkalgal Said:

"Wifi Speed reduced after iOS 15: Anyone noticing reduced wifi speed after iOS 15 update ?[...]"

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Give Apple Feedback:

I have not come across that myself, though I have seen some posts about it.

So, do your Part: Provide Apple with feedback on this, letting them know what exactly is occurring.  Apple may not get back to you directly, but the more feedback they receive on this, the more they will know what is occurring, and what bug fixes to include in updates to come.

1. Go Here: Feedback - iPhone - Apple
2. Select: "Bug Report" for the "Feedback Type"
3. Comment: on when you came across this issue, and how you have troubleshot it thus far.
4. Proceed from there as necessary

If you have iCloud+ you might want to double-check if the Private Relay beta feature is off. This essentially works like a VPN, so it could be slowing your internet.

You can find that in your iCloud settings on iPhone.

The next thing I’d recommend is take your phone and another device to somewhere with WiFi access - an Apple Store, a restaurant, a mall, etc. - and see if the speed differential remains or if it is just your router.

There are a variety of router-focused reasons for what you are seeing so it would be a good next step to try to diagnose the issue further.

That’s the thing; if you see the same issue on the same model of router, it may well be the router.

If you see the same behavior on a different brand of router, that points toward the phone and/or iOS 15.

Thats why I recommend taking your phone and another device to someplace nearby with public Wi-Fi so you can test whether the issue recurs there.

My devices are all just as fast as before.

Make sure you don't have any kind of filtering or VPN enabled on your iPhone 12 Mini.