So, I spent 20 minutes putting together an app that toggles this setting. It achieves the same thing as mentioned in the referenced thread, but should not require root (can't test that as I'm rooted). It's virtually untested, so please report issues.
* Install & launch
* Status: line shows current status
* Use buttons to enable/disable
* Reboot after changing setting
This FD setting only affects you when you're on HSPA networks. It doesn't affect when your phone will be on a specific network or anything like that. It doesn't change any radio setting, all it does it disable a periodic wakeup which can drain the battery.
It will not help everyone equally. The only way to know is to test with your conditions. If it doesn't help you, revert (enable) and move along.
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