Please download "OTG Troubleshooter" app, linked HERE, to confirm your device has "USB Hose Support".
*This can be done without having the card reader connected to your phone.
When you open this app, your screen should look similar to the image below with a check mark next to USB Host Support. This is a necessary function to ensure the BoneView will work with your device. If you have the check mark your device will likely work great.
If you do have USB Host Support as the image shows, and the BoneView still doesn't light - Please restart your phone with the BoneView fully connected and SD card inserted fully. If the device still fails to light upon restart - contact us direct with your results.