How do I revert to a previous iOS version on iPhone 6s to fix Wi-Fi and mobile data issues?

My iphone 6s was updated to ios 15.4 recently but will not stay connected to my home wifi .

It no longer gives me access to mobile data

How do I remove it, save all my information and revert to an update that doesnt cause issues

I am not the only person who has had this issue



[Re-Titled by Moderator]




iPhone 6s, iOS 15

Posted on May 20, 2025 6:14 AM

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Question marked as Top-ranking reply

Posted on May 20, 2025 6:46 AM

Sorry, you don't, Apple doesn't support downgrading the operating system.

Try a forced restart.


• Press and quickly release the volume up button

• Press and quickly release the volume down button

• Press and hold the side button.

• When the Apple logo appears, release the button.


Force restart iPhone - Apple Support (IN)


If your having issues with your mobile data, contact your carrier and see if they need to push an update.

2 replies
Question marked as Top-ranking reply

May 20, 2025 6:46 AM in response to FerDinanD15

Sorry, you don't, Apple doesn't support downgrading the operating system.

Try a forced restart.


• Press and quickly release the volume up button

• Press and quickly release the volume down button

• Press and hold the side button.

• When the Apple logo appears, release the button.


Force restart iPhone - Apple Support (IN)


If your having issues with your mobile data, contact your carrier and see if they need to push an update.

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How do I revert to a previous iOS version on iPhone 6s to fix Wi-Fi and mobile data issues?

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