Hey guys, I know there are some major issues with IOS6 beta 1 and 2 just now but I have a huge problem now. when I go to make a phone call, it'll immediately go into Speaker Phone mode (icon is blue) but sound will not come from the speaker, or from the earpiece. I switch speaker phone off and the same problem. Other users on this form have reported this exact same problem. I have done some investigating in the last few days. Here are my findings. Upgrade to iOS6 beta 1 The phone call problems started, when I go to make a phone call, it'll immediately go into Speaker Phone mode (icon is blue) etc etc (see above) sometimes the phone will be find and let me make calls and receive calls. about 90% of the time it won't. I tried a reset, a hard reset, installed IOS6 beta 1 again, still the same issues. Upgrade to iOS6 beta 2 This time I look further into it. The iPhone 4 baseband has changed now to 04.12.02. Could this be the problem????. Some people on different forums seem to think so. Downgrade to iOS 5.x.x again. Since Apple is still signing iOS 5 I can downgrade ok. but my baseband still remains at 04.12.02. Before the upgrade to beta 1 it was at 04.12.01 and everything worked fine. Is there anyway to downgrade back to baseband 04.12.01 and iOS 5.1 Has anyone else had the same problems? I would love to hear from you.