iPhone 15 Pro Max Wi-Fi Issues

The same problem happened to me on my iPhone 15Pro. This happened on both IOS 17.0X and IOS 17.1. I went into my ASUS RT-AX86S router and disabled the 5Ghz WiFi network 160Mhz bandwidth and it worked instantly. My phone is still working on 5Ghz smoothly even after 24hrs.

Happy to report that 17.1.1 that got released today fixed this completely for me. Now I get seamless Wifi 6Ghz signal with 1000/40Mbps rates, roaming from eero Max 7 satellite to satellite across the house.

Tuna

Hi all. I was having the same problem with slow Wi-Fi and apps saying no internet even thought phone was connected. I deleted Norton 360 which was the VPN software and Also Norton VPN (separate app from 360) All now works fine and now the Wi-Fi icon shows on the phone.

i just contacted TP Link Specialist Support and TP link RD Team

i found that my iphone X and 15 PM can't connect to wifi channel 36-64

Whenever we set channel 149 and above the iphone can connect to 5 GHz band, otherwise will stuck on 2.4 GHz band.

so if you can setup your router/mesh 5 GHz band channel from 36 to 149 will help alot!

am using deco x80(not 5G model), now i receive full speed on my iphone 15 PM.

cmon apple let your device can connect to wifi channel 36 to 64!

ZCX

If you read the link and specifically the explanations of DFS and TPC, you'll see that for lower channels they may need to change frequency and power levels to avoid RADAR and other sources of interference. This often means the signals may be at levels low enough you can only connect when in the same room as the Wi-Fi router.

Other channels, such as those at 149 and above, are not subject to the same restrictions.

That's not an Apple issue, it's part of the Wi-Fi standard.

https://en.wikipedia.org/wiki/List_of_WLAN_channels

Just because your router is new doesn't mean it has the most up-to-date firmware installed, so you should check.

It looks like the last firmware update for the AXE5400 was released in August, 2023:

https://www.tp-link.com/us/support/download/archer-axe5400/#Firmware

I had the same problem. Connected on the WiFi but no internet. Restarted the router and my phone but nothing changed (neither on 2,4 ghz nor on 5 ghz). And then it hit me. I checked my vpn app and I saw that it was trying to connect on a vpn unsuccessfully again and again (without any action on my part). I closed the app and my internet connection was up immediately! I don’t know if that’s the solution for everyone but it worked for me!

Thanks! This was my issue as well, although it was the McAfee Security & Wifi Privacy app in my case. Exact same issue that after transferring to a new phone, some apps (but not all) could not tell that I had an internet connection. I also would see the VPN toggle flickering within Settings. After deleting the app, the other apps started recognizing my internet connection again. I also could not see in the Wi-Fi connection in the top bar on the Home Screen until after deleting the McAfee Security app.

I am also using an ASUS mesh router. My issue with seeing 5G WiFi network is about 3 months old. Was never an issue and is only an issue on iPhone 15 ProMax. All other devices in the house see the 5G WiFi just fine. Note I also have an issue seeing other 2G WiFi networks in the area when I am locked into my home 2G WiFi.

After reading through multiple posts and sites I tried disabling the 160 mhz option on the wifi router backbone SSID. This appears to have solved the issue.

Thank you to all who are posting what is working for them. Apple Tech support response was technology is complicated.

It was nordvpn for me! Deleted it and it connected straight away.

ASUS has had many issues with 160 MHz on their wireless routers.

Make sure you have the most recent firmware they offer installed.

I went to Verizon and they actually fixed this for me. Apparently it’s the VPN messing with the WiFi connection. The guy in the store just deleted the VPN out of my phone and I’ve had uninterrupted WiFi access

I found that manually changing the DNS to Google's public one, 8.8.4.4, leaving it on that DNS for 30 minutes and then getting rid of that configuration seems to have fixed my issue at least for the past 12-14 hours. We'll see I suppose but it might be worth a try for you since I had the exact same issue you describe with my 15 Pro.

Same issue happens to me on my iPhone 15 Pro Max and Unifi UDR router. As stated back on the reddit thread I've been involved with, my only solution is to disable the 160MHz channel option on my UDR device.

If anyone at Apple wants, I'm more than happy to help provide additional diagnostic tests to get this issue fixed.

Your comment ultimately fixed my problem. I went into VPN under settings and turned my status to “Not Connected”. My IPhone 15 Pro, that had previously refused to connect to my WiFi at all, immediately connected itself. I could cry, THANK YOU!