Hi Peppe1478969325, While we're glad you like the noise cancelling feature of the WH-1000XM4, we regret to hear you're unable to connect to the app. If the Headphones Connect app does not detect the headphones, please follow the steps below. Check if the issue is resolved after you complete each step. Make sure the Sony | Headphones Connect app is updated to the latest version. Power off your smartphone device and then power it back on. Update the software of your smartphone. Uninstall and reinstall the app. Inititalize the headphones. REF: https://helpguide.sony.net/mdr/wh1000xm4/v1/en/contents/TP0002752746.html If you are unable to resolve your concern, please email us at socialsupport@am.sony.com with the following details: Name: Username: Model Number: Issue: Telephone Number: Sincerely, Sam

Hi MRANKINS, We appreciate the 5-star rating! Intelligent and intuitive, the WH-1000XM4 headphones offer further improvements to our industry-leading noise cancelation, exceptional sound quality, and smart listening that adjusts to your behavior and your location. Using the Sony Headphones Connect app, Ambient Sound Control lets you adjust the volume of background sound and gives you the option to allow voices alone to be heard. Meanwhile, the Equalizer lets you customize sound levels to suit your music. Thank you for choosing Sony and enjoy your headphones. David

Hi Abhi9, We regret to hear that you are not satisfied with the noise canceling function of the headphones. Your feedback is greatly appreciated. For optimum performance, make sure that the software version of the headset is up-to-date (via the Sony Headphones Connect app). The Sidetone function's effect makes it easier to talk using the headphones and helps the headphone microphone pick up sounds and play your voice naturally. As a result, the noise canceling function works differently from when playing music. If you hear ambient sounds, headphone operational sounds, or white noise (a slight electrical noise with continuous static sound) from the headphones, that is also an effect of the Sidetone function, not a malfunction. Noise cancellation doesn't transfer during telephone calls. Although it protects the headphones user from the surrounding noise, it doesn't apply to the receiver of the call: they will potentially hear background noise. As a workaround, you can check the settings of your source device or the app that you are using for mic sensitivity if available. Hope this helps. In case you need further assistance, please email the below information to socialsupport@am.sony.com. Name: Username: Model Number: Issue: Telephone Number: Or contact our product support team via phone call or chat through this link: https://us.esupport.sony.com/support/s/support-contact?language=en_US&category=headphones Sincerely, -Ralph

Hi Marina, Thanks for leaving us such a great review on the WH-1000XM4! We are really delighted to hear you're satisfied with the incredible sound quality and excellent noise cancellation of your WH-1000XM4 Wireless Noise Cancelling Headphones. It sounds like we hit the mark with the WH-1000XM4! Intelligent and intuitive, the WH-1000XM4 headphones offer further improvements to our industry-leading noise cancelation, exceptional sound quality, and smart listening that adjusts to your behavior and your location. Using the Sony Headphones Connect app, Ambient Sound Control lets you adjust the volume of background sound and gives you the option to allow voices alone to be heard. Meanwhile, the Equalizer lets you customize sound levels to suit your music. Thank you so much for choosing Sony! -Jess