I'm getting a notification that says "Unfortunately, A-GPS has stopped." What should I do? ← TRX7 Device Troubleshooting. Don't worry if you see this notification. This has no bearing on the performance of your TRX7 device.Please email us at firstname.lastname@example.org or call 877-255-4161 (Mon-Fri 8AM-5PM PST) if you're having any other technical issues.