iPhone 12 Speaker Volume Very Low After iOS 26 Update + Screen Flickering Issue

Hello everyone,


I am using an iPhone 12 and iPhone 13. After updating my phone to iOS 26, I started facing serious issues with my device. The speaker volume has become extremely low. Even at full volume, I can barely hear music, videos, or speaker calls. It feels like the speaker is almost not working.


I have already updated my phone to iOS 26.1 and iOS 26.2, but the issue is still not fixed.


In addition to the speaker problem, I am also facing a screen flickering / fluctuating issue occasionally, where the display brightness or screen seems to fluctuate randomly.


These problems started only after the iOS 26 update. Before that, everything was working perfectly fine.


Has anyone else faced the same issues on iPhone 12 after iOS 26?


Any solution or guidance would be really appreciated.

Thank you.

Posted on Dec 22, 2025 8:08 PM

Reply
3 replies

Dec 22, 2025 11:55 PM in response to satish_yadav

It's not always the iOS update's fault!  Many things can cause phone problems.  If you tell people you think it's an iOS update, it might make it harder to fix or find a solution for the real issue.



Remember, the right question often leads to the solution!



Was/Is your device Jailbroken? If that's the situation, please be informed that attributing the issues to iOS updates may not be accurate.



iOS updates aim to enhance user experience, boost security, and fix bugs rather than disrupt core features. The majority of the issues after updates might stem from underlying, unmentioned factors. Updates won't typically alter personal data but may refine settings or features. Backup before major updates for safety. Review Apple's update details and backup advice for a smooth process.


Kindly consider checking your settings and addressing any device issues before attributing the issue to external factors. This could be a pure coincidence that the iOS update affected the iPhone functions.


Before initiating a standard iOS update, it's advisable to create a backup. Have you completed this step? If yes, proceed with the restoration from the backup.



See what each update does: OS — iOS 26, About iOS 18 Updates, About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...




Dec 22, 2025 11:57 PM in response to satish_yadav

satish_yadav wrote:

Hello everyone,

facing serious issues with my device. The speaker volume has become extremely low. Even at full volume, I can barely hear music, videos, or speaker calls. It feels like the speaker is almost not working.

You may have accidentally set a volume limit for the Built-in speaker under Settings > Sound & Haptics > Volume Limit. This feature is designed to restrict the maximum output volume on your iPhone. However, if you find your iPhone’s sound lower than expected, you can remove or adjust this limit.



Dec 22, 2025 11:58 PM in response to satish_yadav

satish_yadav wrote:

Hello everyone,

I am also facing a screen flickering / fluctuating issue occasionally, where the display brightness or screen seems to fluctuate randomly.

Purchase Apple Products from the Apple Online StoreApple Retail Stores, and many Apple-authorized resellers and wireless service providers.



Expressing or conveying visual experiences effectively through these forums may be challenging. The underlying visual issue on your iPhone cannot be accurately diagnosed online. Factors such as your iPhone's specific settings, visual defects, and potential hardware problems cannot be assessed through this method. For more personalized and in-depth assistance, I recommend securing a Genius Bar Reservation and exploring the various support options provided by Apple.


Get a Genius Bar Reservation and Apple Support Options - Apple

When you encounter issues with your Apple devices, the Genius Bar at Apple Retail Stores is the go-to place for expert assistance. The Genius Bar is staffed by knowledgeable Apple employees, often referred to as "Geniuses," who can diagnose and resolve a wide range of hardware and software-related problems. To ensure personalized attention and a convenient visit, Apple provides the option to schedule a Genius Bar Reservation.


Contact Genius Bar.

Manage Reservations - My Reservations - Apple




iPhone 12 Speaker Volume Very Low After iOS 26 Update + Screen Flickering Issue

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