Why won't my iphone 4 make sounds?

My volume is up, not turned off. But my phone won't make noise when I get a text or a phone call so I'm always missing calls which is not positive. Also my apps don't make any sounds either but if I play music on youtube or on spotify it works. Is something in my settings doing this? How can I fix it? > ^ <
~Thanks!

Just above your volume buttons there will be a little switch, try switching that. If that doesn't work, go into your settings and into Sounds, and there should be a volume control there. One part will say "Change with Buttons" make sure this is on. If this doesn't work, then it has the same problem as my iPod touch 4th gen. It's a common problem and it's easy to get rid of. Most music apps will have a differing sound system to other apps. Turn your volume up on the home screen with the volume buttons. Does it say 'sound effects' on it? Or is it just a white speaker? If it says sound effects then there's something I can't help you with, but if it doesn't say sound effects then you will have to go to your settings, into 'sound' and with the slider that controls your volume, just slide that around a few times, them go to your home screen and try your volume again. Does it say sound effects? Problem solved. Your sound will now probably work. Hope I helped xx

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