Introduction

1. Update firmware and the Bad Elf Flex App:
   
   • Search for the Bad Elf Flex app on the App Store or Google Play.
   • Update the Bad Elf Flex app to the latest app version.
   • Open the Bad Elf Flex App and check if a firmware update is available.
   • Install updates if available.
   
   • Disable battery optimization features on your phone or tablet that may interrupt Bluetooth, and enable all permissions for the Bad Elf Flex app.
   

   Firmware and app updates include improvements to GNSS performance, Bluetooth stability, and corrections.
2. GNSS requires a clear sky view. Please evaluate sky visibility and surroundings by verifying:
   
   • There are not buildings obstructing view of the sky in any direction
   • The southern sky is unobstructed (important for SBAS visibility)
   • There are no overhead branches, awnings, or equipment
   
   • The Flex has been powered on for a few minutes to settle
   

   If the Flex works well in open sky but poorly in certain places, the cause is likely antenna obstruction or interference.
3. Confirm the normal fix progression.  Check the GNSS Status page and look for: 
   • Fix type: 3D at first, then SBAS
   • Horizontal accuracy improving toward 30 to 60 centimeters or better in open sky
   

   

   Reaching SBAS confirms the receiver is tracking satellites and applying differential corrections.

   

   If these values do not look healthy, continue to the satellite checks below.
4. Review satellite quality in the Satellites page in the Bad Elf Flex App. A strong GNSS environment has:
   

   • Multiple constellations in use (at least one of: GLONASS, Galileo, BeiDou)
   • Most satellites have a signal-to-noise ratio (SNR) above 30 dB-Hz
   • Several satellites’ SNR between 35 and 45 dB-Hz
   • An SBAS satellite SNR above 28 dB-Hz
   • Stable bars that do not flicker or drop
   

   • Satellites spread across the sky rather than grouped to one side

   Tap the bar columns to cycle what is displayed on each bar:
   • Unique satellite IDs
   • Satellite signal strengths (SNR measured in dB-Hz)
   • Disable labels
   High, steady SNR across multiple constellations is the strongest indicator that GNSS conditions are healthy.

   
   
5. If satellite signal strength is weak:
   

   • Move to an open sky area
   • Step away from trees, buildings, vehicles, fences, and metal structures
   • Keep the Flex upright on a pole
   • Avoid standing close to the antenna
   

   • Turn Forest Mode off unless you intentionally need it

   

   If satellite strength improves in open sky, the issue is likely environmental rather than device related.