When the update stalls at , it means the software has successfully erased the base station’s memory but failed to write the new code. The base station is now in a "bootloader mode" (a safe, blank state) but cannot communicate properly with the PC to receive the new file.
Launch the Command Center; it should immediately prompt you that a "Headset in Bootloader Mode" has been detected and ask to recover it. ⚠️ Common Pitfalls to Avoid astro a50 firmware update stuck at 25