Preventing automatic data connection on my Palm Treo 750 (WM6)

I found that ActiveSync that was continuously connecting over my 3G mobile data connection. I only get 20MB/month data, so I’ve had to prevent WM automatically syncing.

This started happening once I had set up a connection to Microsoft My Phone and Google Sync (which emulates an Exchange Server).

This is how I’ve set up my Palm Treo 750 (running Windows Mobile 6):

ActiveSync
Menu | Configure Server

• Server address: m.google.com {using SSL}
• User name: my.name@gmail.com
• Password: MyPassword
• Save password [Checked]
• [Advanced] Conflict: Keep item on my device
• Synchronize: Contacts and Calendar {Tasks are not (yet?) supported by Google}

Menu | Schedule

• Sync during: Manually
• Send/receive when I click send [Unchecked]

Microsoft My Phone
Menu | Sync Schedule

• Frequency: Manual

Incidentally, MS MyPhone is one of the few Windows Mobile applications that has an Exit option (under Menu).