Try here buddy I’m not really familiar whit the e815
Motorola E815 - Motorola US it says this : Introducing the powerful Motorola E815. With
EvDO (Evolution for Data Only) technology, this sleek, silver flip phone provides on-the-go broadband connectivity for rapid downloading and Internet connections. Must-have tools include a 1.3 megapixel camera, MP3 player, Bluetooth® wireless technology and impressive storage -- letting you work and play hard, anywhere, anytime.
And:
USB Data Cable - 98571/SKN6311
Access your data, the Internet and e-mail on the go. The USB Data Cable - SKN6311 works with your data software to connect your phone to your PC.
A travel charger can be connected to the side of this USB cable, so you can charge your phone while you transfer data.
Note: The USB Data Cable must be used with Mobile PhoneTools or USB Data Kit - sold separately.
Access your data, the Internet and e-mail on the go.*
*Data and
GPRS data service not available in all areas. Please contact your service provider for details.
Please note: USB connectivity is supported on Windows 98SE, 2000, ME and XP. USB is not supported on Windows 95, 98 First Edition or Windows NT 4.0.
* Network and subscription dependent feature. Not available in all areas.
And
Motorola Bluetooth® PC Adapter PC850 - 98716H
The Bluetooth® PC Adapter lets you take it all along without feeling tied down. Plug the adapter into your computer's USB port and let the music flow! You can listen wirelessly on your Bluetooth® Stereo Headphones or combine with the Bluetooth® Home Stereo Adapter to stream audio through your home stereo speakers.