Alpha TT25 or Alpha T20 Collar Shows a ? on Alpha or Astro Handheld

When tracking Alpha® TT25 or Alpha® T20 dog collars with a handheld unit, a "?" icon may appear on the dog info page, dog compass page, as well as the map page. This icon indicates that there is a satellite signal or communication problem with the collar. Refer to the sections below for troubleshooting steps to resolve this issue.

Satellite Signal Issues

If the collar is nearby, the most likely cause of the "?" icon appearing will be satellite signal issues. You can determine if this by checking the light on the tracking collar itself. When attempting to connect to the GPS satellite signal the collar will continually emit a yellow flash. Once connected, this will change to a green flash. 

Communication Issues

If the collar is emitting green flash but the "?" icon still shows, there is some other communication issue occurring. The following FAQs provide helpful information to identify, troubleshoot, and resolve issues with interference or range:

• Range Issues and Troubleshooting
• Alpha and Astro Radio Communication System: Understanding the Channel, Radio Frequency, ID Number System, and Conflicts

If the communication issues persist after reviewing these FAQs the next possible cause is a damaged VHF antenna. Replacement antennas are available for purchase on Garmin.com at the following links*:

• Standard VHF Antenna
• Long-range VHF Antenna 

If the collar continues to display the "?" after troubleshooting for both satellite signal and communication issues the collar's GPS Flex Band may need to be replaced:

• Flex Band (Alpha TT 25 Dog Collar)
• Flex Band (Alpha T 20 Dog Collar)