Many issues are solved through the NoahLink Wireless Configuration Tool, which manages the Hi-Pro 2 connection.
: Certain hearing aid firmware updates (like for legacy Oticon Opn models) cannot be performed wirelessly ; they strictly require a wired connection through a device like the Common Troubleshooting & "Deep" Issues Hi Pro 2 Connectivity Issue - Page 2 - Hearing Aid Forum hi pro 2 firmware update