Originally Posted by tbonus76
My wife and I have this same problem and it is driving me nuts. After researching it for a couple of weeks, I finally relectantly decided to flash her phome back to ICS 4.0.3 last night, while leaving my phone on 4.0.4. So far today I have had the same problem you describe happen to my phone 3 times, while hers has been fine so far. Still a little early to know for sure if that is the fix, but I'll let you know...
This is the thread that finally made me decide to try to go back to 4.0.3, it seems that the 4.0.4 update switched the radio from version LE1 to LH1 and the LH1 version is possibly the source of the call problems we are having:
Hmmm....this is interesting...I was experiencing this issue before I upgraded to 4.0.4 and I just might see it more so now in 4.0.4. I was thinking of going backwards to Gingerbread, using Odin5, but I don't know if this is considered Rooting or not. It seemed that using GingerBread, EVERYTHING worked flawlessly...and now, in ICS...not so....