It happened to me on 3g but not 3gs a couple of times. But the problem solved itself tho im not really sure what happened. My theory is maybe that the headphone jack still register the headphone is there (although you've taken it out) so you cant hear unless you do loudspeaker. Should not be a major problem since it only ahppened couple of times for me.

---

Added on July 7, 2010, 9:22 pmthis is the easiest steps on downgrading from ios4 to 3.12 on conditions you have stored your SHSH in cydia server.
Good luck

http://iclarified.com/entry/index.php?enid=7557


This post has been edited by al3p: Jul 7 2010, 09:22 PM

Maybe out of topic. But I got kinda bubbles under my screen.
I know the solution is just quick 10 mins fix if I were to brought it to the store since my 3GS is still under warranty but I can't since it is an Australian set. Anyone here kindly enough to point where I can take my phone to get a clean wipe under the glass? Preferably around kl or Ipoh. Thanks.

---

Added on July 10, 2010, 5:38 amGo to setting-->phone(green icon)--> call waiting and turn it on. Usually it is automatically on. Hope that helps

This post has been edited by al3p: Jul 10 2010, 05:38 AM