What should I reset my iPhone so I can download apps again?

Lately, my phone won't download any apps or go on youtube from safari. Maybe if I fix the apps I can fix youtube as well? I would get the youtube app but I obviously can't. I read somewhere that you need to reset the device but the on/off button on my phone is broken (it said to reset it I would need to press and hold that button as well as the home button for 10 seconds.)

I went to General > Reset, but what do I reset? The options are Reset All Settings, Erase All Content and Settings, Reset Network Settings, Reset Location and Privacy.

It would be really great if my phone and the content already on my phone was not damaged or deleted or lost!

How much should I sell my iPhone 5 for? - 2

I have a 16GB Black iPhone 5 (Unlocked), and want to sell it on eBay (or another similar website) sometime soon, but I'm not sure what price I should put it up for, so that people will actually buy it?!
The screen is 100% new and scratch-free, because I have had a screen protector on it for the entire time, the back is also completely fine, however under a certain angle there are a couple of very faint dots.
The sides, however, have a couple of scuffs, which are pretty common for the iPhone 5 because the edges are very prone to damage.
I'd just like to get an estimate of what you think I should sell it for, and what you'd be willing to pay if you were buying in!

How to change contacts to phone numbers on lock screen for iPhone?

So you know how when you get a text the contact name shows on the lock screen? Is there any way to make it so the lock screen shows the actual phone number instead of the contact name without deleting the contact? I don't want people to see who texts me until I unlock my phone

Iphone 4s won't play music out loud?

My iPhone 4s plays music when i plug in the headphones but when i try and play music out loud its silent. The volume is up and there's no problem with the volume limiter so there shouldn't be a reason for it not to play out loud. I have tried cleaning the headphone jack but i don't know if it helped or i didn't do it right. Can someone give me an insight into what has happened and whether I need to replace it?

Why can't I text with my iPhone?

It's used. I got it in February. It's an iPhone 4. I have a minute card and got that set up. I can call and receive texts/calls, but I can't text. Please tell me how I can fix this! Thank!

Software update on my iPhone 4?

So there was a lot going on when the ios7 came out on apple products about how it breaks the iPhone 4's so i never updated mine, now the iOS 7.1 is out and i still only have the iOS 6 on mine. Does anybody know if they have fixed it yet? If i update my iPhone 4 to the newest software update will my phone crash or break?!