Hello everybody I need help. I bought this gimbal to make recordings with the iphone AR system. I open the usdz file, insert it into the environment but when I click on the record button, the volume symbol appears on my smartphone .

Hi there. Thank you for reaching out and we're sorry for the trouble. We strongly recommend using the DJI Mimo app for your DJI Osmo Mobile 4 as we cannot guarantee that it will work with any 3rd party application. You may install your mobile device on the unit and use your original camera app, however, the unit will only serve as basic stabilizer for your mobile device. Hope this helps. Thank you for your valued support.