Internet speed slow down after IOS 17.1 update

Same here. Iphone 12 WiFi is miserably slow after updating. All of my other devices are in the rage of 1gig up and down which is my ISP speed, but my Iphone is about 20 up and 10 down. I've never seen any other device that has slower download speed than upload speed. Please fix this issue!

There seems to be a problem with Microsoft Defender on the iPad. I was having very slow Wi-Fi . I tried just turning off VPN in Defender but it would just get turned back on. So I deleted the Defender app, and my sped went immediately from 8 Mbps to 500 Mbps. That’s all I know except that none of the “standard” fixes worked.

That worked!! Full speed is back after I also closed all then restarted but it was turning of the ICloud relay that fixed it. I did the “for 24 hrs” setting because was concerned about security. If I loose speed in 24hrs then I guess am forced to keep the relay off.

Anyone know how concerned we should be to turn off the ICloud relay? Given the choice I rather have my speed back but sad to be forced to choose

Tried all that was suggested but nothing worked till i disabled “Private Wi-fi address”. Speeds are back to normal. Tested if this was the cause by re-enabling “Private Wifi address”. As soon as it was enabled it slowed wifi slowed to a crawl . Once disabled back to 300+Mbps from less than 10.

Hope this info helps someone.

After updating ios 17.1 on iPhone 13 system get slow down when I connect with WiFi where as it’s 5g network with 150 mbps speed and when I connect to mobile internet it’s works fine what is the issue I tried forgot network reset network setting even restarting phone and so on still issue is there

I had this exact same issue over the past couple weeks and disabling the "private ip address" ticker in the wifi settings worked.

You go into your wifi networks, press the little blue "i" next to the network you're connected to, and scroll down to "private ip address" and switch it to off. Do a full reboot of your phone afterwards.

Once I did this, all my app browsing sped up drastically. I am unsure how important/risky it is to have the private ip address setting turned off, but I'm happy I dont have to switch between my wifi and cell data anymore. Hope this helps someone.

Not op, but have been having the same issue. I did all these steps, but to no avail. My network works on other devices (I.e. my desktop, laptop, and tablet) at full speed (500mbps fiber) meanwhile my iPhone is sitting around ~30mbps. Are there any other more advanced options available?

My internet 5G is buffering .17.2.1 is updating after face this problem

Didn't help for me

My wifi picked up a lil more speed after I turned on the private relay , it was already off for me

Local data very slow internet

Very very poor internet for iPhone

I actually turned it ON and it seemed to help, at least for now!

Resetting the Network settings as other suggested helped. However, disabling most of the apps from "Background refresh" did the trick.

After updating iOS 17 on my iPhone 12 the app that seems to use data are running slow. Can’t even download on Netflix, safari runs very slow, X doesn’t even load ion know what’s up