hello all, i have recently notice that if i am listing music/video using head phone ( non - apple, but good quality) and if i receive a phone call, i could talk/listen using the headphone. but if i pull out the jack, and try to talk on phone i dont get voice and caller dont get my voice either. Now, while the call is connected, if i put the jack back i can listen and so call as well. If i disconnect my call, and make a call without jack, i cant listen ring/voice and so on.. i tried 5 times, but all the time, it looks like iphone doesnt switch my jack to phone...may be after 15-20 min. it comes to normal..or if i reboot my iphone... Do u guys think its a big issue and i sud get it replaced... Thanks for the time..