I have Iphone 4s with IOS 7.04. yesterday, I found that my all sounds are sielent except ringing tone. I havent hear text sounds, e-mails alert sounds, viber incoming call souns, when I put my phone on charging I havent hear its switch charge sound, screen lock sound etc. my phone is only vibrate when I got any text message or e-mail. but, when I receive call its ring sound. I have check my phone setting all sounds shown on and its status is not at do not disturb mode. sound volume is 100% not showing anything sielent. Please help me out to unsilent these sounds as they are very anoying.