nickbair.net >HP iPAQ h6365 Pocket PC ROM Update version 1.00.38 (14 Feb 05) Modified to update ROM on HP iPAQ h6315. This is not an official release.

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HP iPAQ h6365 Pocket PC ROM Update version 1.00.38 (14 Feb 05) Modified to update ROM on HP iPAQ h6315. This is not an official release. Use at your own risk.
Primary Upgrade Links

PDAPhoneHome.com Thread
The original thread regarding this upgrade. Do not perform this upgrade without thoroughly reading this information. This is also where to go if you have questions. Do you see a link to my email address on this page? No. "Okay, I'll just go to the root domain and find his email link there." Well don't. I will ignore any personal help requests. Thanks.
ROM Patch
The modified ROM patch as described in the forum thread. Do not install this patch without reading the above link.
T-Mobile Install Pack
All the necessary files to restore many T-Mobile-specific apps. Restores the Battery Monitor, SIM Phone Book, Today Screen plugin, and email trigger functionality. Instructions included in .zip file.

Miscellaneous Files

T-Mobile Extended ROM Bundle
The unsupported group of files removed from the original h6315 ROM by dmc874 in the forum. It is available here for whatever purposes. Use the T-Mobile Install Pack above for a cleaner installation.
T-Mobile Email Trigger Apps
More unsupported files available for whatever. If you simply want to reactivate email triggers following the ROM upgrade, use the T-Mobile Install Pack listed above.

Some other files of interest for h6315 users are available here.