Samsung SM-R323 Gear VR User Manual page 41

Note: Ensure that the connector is fully inserted into the mobile
device's USB port. The device makes a sound when properly
connected.
Caution: Do not forcefully insert the connector into the mobile
device as this may damage the connector. Improper installation can
scratch the mobile device.
4. Insert the mobile device into the center of the Gear VR and gently
push the mobile device until it
locks into place (2). The device holder (right) will return to the
previous position and hold the mobile device (3). The mobile
device will emit a sound when it is connected to the Gear VR
properly.
Caution: If the mobile device is not securely locked, the mobile
device may accidentally separate from the Gear VR and be damaged.
Do not twist or bend the Gear VR's connector when you connect or
disconnect the mobile device. Doing so may damage the connector.
Getting Started 41