you can use android mobile app or use laptop ,if you use laptop , you will need usb dongle to connect with j10 hearing aid via ble,if u use mobile app, u can download from google playstore or appstore, or direct download link : https://www.jhearing.com/web2/docs/fota%20demoapp-release.zip
![](https://i0.wp.com/en.jhearing.com/wp-content/uploads/2023/11/androidfota_20231102132816.jpg?resize=135%2C300&ssl=1)
upgrade via onsemi ble explorer , in step u , u click update firmware , it will prompt u to select the .fota file
![](https://i0.wp.com/en.jhearing.com/wp-content/uploads/2023/10/image-2.png?resize=1024%2C542&ssl=1)
this is sample screen shot , you need plugin usb dongle ,in my laptop ,it appearas as COM3,and the .fota file is the upgrade firmware file
![](https://i0.wp.com/en.jhearing.com/wp-content/uploads/2023/10/image-1.png?resize=1024%2C425&ssl=1)
I attached a sample fota files ,and hex files at https://www.jhearing.com/web2/docs/J10_1028_how_to_fota.zip