Back on Jun 18, at the beginning of the "Any One Having Missed Call Problem after ED04 ..." thread, wardcst24 posted that the Wake Lock app seemed to fix the issue of missing calls and that all calls now were received A-OK (not sure about texts).
I think the train of thought is that after the Froyo / ED01 / ED04 updates, when the phone is in sleep mode it doesn't recognize some incoming calls and texts, but that this app keeps the CPU active enough to detect them when received. There's probably a (minimal?) hit to memory / battery life / processing speed, but certainly acceptable vs missing calls.
Has anyone had any luck with this or a similar app? I can't test it since I'm still on 2.1 (never got around to upgrading to Froyo, sometimes it pays to be lazy . . . )..
Here's the thread with the original Wake Lock reference:
It did work but when you would get a call wake lock would crash and if you didn't remember to reset it you would start missing calls again.
It would consume 3% per hour
I could not deal with having to remember to reset all the time so I sent my phone back to Samsung for the 5th time.
There is another one that is said to work very well it is sofLocker
I have not been able to test because Samsung has my phone for time #5