IOS7. Do I have to re-download apps?

Hi everyone I've just installed ios7 for my iPhone but afterwards all my apps have disappeared, can I get them back by plugging my phone into iTunes? Or do I have to re-download them all individually?

Any help would be greatly appreciated.

Hometheater speakers to receiver?

Hi, I have a Sony STRDH720 7.1 Channel 3D AV Receiver and when I connect my Iphone through 3.5mm jack to RCA in the back of receiver sound only plays through couple of the speakers. I have a 5.1 set up.two front, two back, center and a subwoofer speakers. So this is the first problem I run into when I connect something to play through the RCA connection I don't hear sound through all speakers.
second problem is that I don't hear the subwoofer. I have to go and change the front speaker size to "small" only then I can hear the sub.
can you guys give me some advices on what i'm doing wrong.
here is the SUB i have Yamaha YST-SW216BL Subwoofer
and the speakers i use are from this set, sony hcd fx500

New iPhone iOS 7 update?

I hate the new iOS 7 update, and it makes me want to cry out of frustration because I hate it that much. Is there any way that I can get my iPhone back to the old update? Would wiping my phone change it back?

How to delete songs on the iOS 7 for iPhone 4S?

I went to play songs and realized I had all of them on there because they were transferring from iCloud. So I went on to music in the settings app and turned off show all music. But I still have 3 songs that I can't delete! It won't let me swipe left like it can on other songs.

Having problems with my iphone 5? - 1

For some reason, after I updated my phone to the ios 7 update I've been having problems with my text messages. Not sure if the update has anything to do with it though.
For example, my dad sent a text message to my sister and somehow I got it and she thought it was me? And I got all the other texts that follow. FYI, my dad and me both have iphones.
And also, when he sent a text to me from his phone it came up as my mom's name. Don't know if she got the text since she's asleep. My dad can also see text messages I send to other people. I don't know about you but I don't like the fact that can happen, ha. So if someone could help me out, that would be great.

I just downloaded the iOS 7 on my white iPhone 4S?

Then I was fixing up my contacts and adding a picture to a contact and all of a sudden my screen just turned black! It won't turn off or go to the home page it's just there. The black lighted up screen. I don't know what happened! Please tell me what's going on or how I can fix this! I would really appreciate it. I'm using my iPod right now for all of you courious people out there.