[puff]

Note that you MUST reset / recycle your device for it to start working (but not in the opposite direction). It works in exactly the same way as GB-SOFT Tweak: it sets the value of HKLM\Comm\ ConnMgr\ Planner\Settings \ CacheTime in the Registry and lets the operating system disconnect when there’s no Internet activity in the pre-set time.

(Also see THIS post (in THIS XDA-Devs thread) for more info on this Registry entry.)

Also note that both these apps (phoneAlarm and GB-SOFT Tweak) can also be configured to enable the “Disconnect” button and the timer in the Connectivity bubble (as was the case in WM2003(SE)) as can be seen in THIS screenshot. This, as with the above-shown auto-timeout setting, is just a widely-known Registry hack. (If you’re interested, it’s HKLM\ControlPanel\ Phone\ Flags2 with values 8 (Disconnect button), 16 (both the Disconnect button and the timer) and 0 (neither of them); also see THIS MoDaCo Wiki page).

-> http://forum.brighthand.com/showthread.php?t=250563