WiFi and mobile data bugs iOS 26

Hi! After updating from iOS 18 to iOS 26, my Wi-Fi isn’t working at all, and mobile data is very slow—videos and photos won’t load, and video calls won’t connect. I have the EU version of the iPhone 16 Pro Max with a single SIM slot, so I can’t switch SIMs. I’ve tried restarting the phone and toggling Airplane Mode, but nothing has worked. Are there any solutions how to fix this? Or is it possible to downgrade to iOS 18? Or is the only option to wait for the next update with bug fixes?

iPhone 16 Pro Max

Posted on Sep 23, 2025 9:38 AM

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2 replies

Kurtosis12

Level 10

80,366 points

Sep 23, 2025 9:42 AM in response to Daciak

Are there any solutions other than downgrading back to iOS 18

Sorry downgrading the operating system is not supported.

Issues with cellular and WiFi have been reported by other users as well, wait for an update.

Daciak Author

Level 1

4 points

Sep 24, 2025 8:40 AM in response to Daciak

So basically there is nothing to do with this issue?

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WiFi and mobile data bugs iOS 26