Connect Windows Mobile 6.5 to Windows Vista and 7

Windows Mobile 6.5 interfaced with Windows Vista and Windows 7 PCs primarily through the Windows Mobile Device Center (WMDC), which replaced the legacy ActiveSync software used in Windows XP. This article explains how the operating systems established a connection, the underlying communication protocols used, and the specific synchronization capabilities available to users managing their mobile devices from a modern desktop environment.

The Replacement of ActiveSync with WMDC

Prior to Windows Vista, Microsoft relied on ActiveSync for mobile connectivity. For Windows Vista and Windows 7, Microsoft integrated the necessary driver framework directly into the desktop OS and introduced Windows Mobile Device Center (versions 6.0 and 6.1).

When a Windows Mobile 6.5 device was plugged into a Vista or Windows 7 PC via USB, the operating system used Windows Update to automatically install the appropriate drivers. Once detected, the WMDC interface launched automatically, offering a unified control panel for device settings, file management, and synchronization partnerships.

Connection Protocols and Hardware Interfaces

Windows Mobile 6.5 communicated with Windows Vista and Windows 7 through two main hardware channels:

  • USB Connections: By default, Windows Mobile 6.5 used Remote Network Driver Interface Specification (RNDIS) over USB. This treated the USB connection as a virtual Ethernet network adapter, assigning local IP addresses to both the PC and the phone. This allowed TCP/IP-based synchronization, which was faster and more reliable than older serial-over-USB protocols. Users experiencing firewall or connection issues could toggle the device settings to disable "Advanced Network Functionality," which reverted the connection to a standard serial-over-USB emulation.
  • Bluetooth: Users could also pair devices wirelessly using Bluetooth Serial Port Profile (SPP) or Personal Area Networking (PAN) to sync data without physical cables, albeit at slower data transfer rates.

Synchronization and Data Management

Once the connection was established, WMDC facilitated data exchange between the device and local PC applications:

  • Microsoft Outlook Integration: WMDC synchronized Personal Information Manager (PIM) data—including contacts, calendar appointments, tasks, and notes—directly with desktop versions of Microsoft Outlook (2003, 2007, and 2010).
  • File Browsing: The device appeared directly inside Windows Explorer under "Computer" as a portable device. Users could browse the internal flash storage and external microSD cards using standard drag-and-drop operations without needing third-party file transfer tools.
  • Media Syncing: Integrated support with Windows Media Player allowed users to sync music playlists, individual audio files, and pictures directly to the mobile device or its storage card.
  • Desktop Pass-Through and Tethering: The interface supported Desktop Pass-Through, allowing the Windows Mobile 6.5 handset to share the PC’s broadband internet connection while docked. Conversely, users could use the "Internet Sharing" utility on the phone to tether cellular data back to the Vista or Windows 7 PC via USB or Bluetooth.