The device may show a good signal but this does not necessarily mean it can transmit data.  The best way to check for a good network is to use the speed test page from within the Okappy app.

• Click the Okappy icon,
• Click More, and then
• Click Test network speed.

The following may stop the device transmitting data

• Mobile data is switched off
• Being connected to a public WiFi network which requires a login
• The device is in battery saving mode
• The local network is slow, intermittent or at capacity

Give the device a few minutes to send a new location then update the refresh the radar screen.  Are the device locations now showing?  If not, click Next