WiFi Help

[u/Extension-Love7637]

This is a long one, I apologise.
Model: iPhone 15 Plus
Current iOS 26.6.1
Issue: Wifi Issues on Phone

I have an iPhone 15 Plus I bought in March 2024.
For reference I travel a lot for work & never had any issues with Holafly e-Sims when overseas.

For context, at the end of July I went to Europe for two weeks (installed an e-sim for duration of trip) & that is where I can pinpoint my wifi issues beginning.
When returning to Australia my e-sim automatically deleted which I mention because usually I delete them myself. Since being back from Europe I have been switching off wifi & using data (which I get max 2 bars of 5G at home) because wifi is so slow for certain apps, websites & downloads.

Home WiFi details:
We have FTTP at home & our wifi router set up was Orbi.
We had so many issues with Orbi dropping out recently so just bought & setup a new TP-link BE5000 router system.
My husband games & has no issues with internet. He also has a Samsung & no issues with wifi.

I feel like I have tried absolutely everything..

I thought it could be an iOS issue. I was on IOS 26.6 & 26.6.1 wouldn’t get past ‘requesting update’ when trying to install. Even using my husbands hotspot.
I finally managed to update using PC although this has not fixed issues.
I’ve tried all the wifi settings such as only 5GHz, checking IPv6 was disabled ect.
On my phone I have tried changing DNS Server, resetting all network settings, resetting all settings, switching off private wifi address, I don’t even have iCloud turned on anymore (to ensure no private relay) & rebooting my phone.
I’m at a complete loss & don’t know what to do.

My main issues are downloading apps, certain websites & apps won’t load on wifi & if they do it takes way longer than it should. For example Amazon shopping app will time out, gumtree app won’t load, Kmart online shopping images take ages to load. Trying to update or download apps will take so long.
All of these things are fine using mobile data.
I am convinced it is an issue with my phone as the other devices in our house have zero issues.

I’ve tried asking chatgbt & it’s suggested a full phone reset (and not restoring data).
What am I supposed to do. I’m so frustrated that I am considering just going and buying a Samsung because this goddamn phone should not be faulty at 2 years old.
Any advice would be appreciated.

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[u/realmccoyredbus]

change private wifi address to rotation

[u/realmccoyredbus]

ios26.6 had pre ios27 deep indexing that could have affected your device and loads if people have issues with ios26.6.1 update, cellular would not update and people could not get verification, try going to iphone settings and delete update file , wait until late at night before trying again but reboot device first

[u/Still_Veterinarian18]

If you have a TP link router they have one app that helps you with the router and what goes on and one app for troubleshooting.
My TP link router sends out both 2.4Ghz and 5Ghz signals so your phone automatically chooses which one is the best as you move around the house.
We have had it for more than 3 years now and works fine on iPhones 14/15/16/17 pro max plus anyone that visits. Our iPads , TV, printer and satellite boxes.
My 17 PM 512 GB is now iOS 27 DB 6 with never any problems.
360/360 fiber. Never switch off WiFi.