Are the ScanSnap and the mobile device very close together?
Move the mobile device closer to the [Scan] button on the ScanSnap.
Keep the mobile device close to the ScanSnap while the mobile device's ScanSnap Home displays "Move your mobile device closer to the ScanSnap.".
[Android] Have you set up pairing?
If you receive a message asking if you want to pair the mobile device with the ScanSnap, respond to the message and pair the device.
If you did not notice the message, check the history of notifications on the mobile device for the message and pair the ScanSnap with the mobile device.
[Android] Is the frequency band for the Wi-Fi network name (SSID) to which the mobile device is connected 5 GHz?
If the mobile device is connected to a network name (SSID) whose frequency band is 5 GHz, the ScanSnap Go connection may fail.
Change the Wi-Fi setting of the mobile device by performing either of the following, and then move the mobile device closer to the ScanSnap again.
Connect to a network name (SSID) whose frequency band is 2.4 GHz
Disconnect from the network name (SSID) whose frequency band is 5 GHz
If automatic connection is turned on, turn it off.
Leave the mobile device's Wi-Fi turned on.