Should I get iPhone 4S, 5C or HTC one mini?

I'm willing to get a new phone soon
I have a blackberry curve 9320 and willing to get a new phone mainly for browsing.
to use facebook, instagram and other chat services like whatsapp or kik
also i want a phone that is smooth in games and doesn't lag like my blackberry does
at last i need a decent camera and front camera
is there a big difference between the 5c and the 4s?
is the HTC better than both?

Can I view my own YouTube Channel on the iPhone app?

A while ago (probably a year or so) the YouTube iPhone app would have an option in the menu to view your own channel. In the menu, you'd just have to click on the "More" button, and you'd be able to see a "My Channel" button on the list. Now, I can't seem to get to my channel at all on the app. I recently made a new channel, edited the info, and uploaded a profile pic and channel art. On the desktop site, when making a channel, they tell you that things will look different on different devices, so I want to check to make sure it looks alright on mobile devices, but it doesn't seem like there's any way to do that anymore, which doesn't make sense. I would just try opening up one of my vids and click on my channel name, but I don't have any vids up yet. Also, I tried searching my channel, and it doesn't even show up on the list. Is there not a button anywhere on the menu that says "My Channel" or anything like that? Any help with this?

How to activate my iPhone 5S?

I visited Mongolia this week and I bought a Mongolian MobiCom Sim Card. I bought the iPhone 5S from Los Angeles. It worked fine when I inserted the Sim Card. But after I updated my iPhone it suddenly went through the activation screen. When I was about to finish it, there was an error: Invalid Sim Card. I went to the shop and told them what happened and they said it needed to be activated again for 150$. How can I activate my iPhone? Can I do it for free? I'm not sure if the phone is factory unlocked. The sim card they gave me had a platelete or something like that. Anyway thanks in advance!

How to get more performance out of my iphone 4s?

I've disabled spotlight search, i reduced contrast and motion, disabled app background refresh, close background processes and everything else that was recommended to increase performance. My iphone does run well doing ordinary tasks such as web browsing and such but apps seem to run slow. I want to play call of duty strile team but the game runs pretty slow on my device. I'm running ios 7.1. Is there any ways to get more performance out of games like this? I was gonna overclock my device using my root files but because i update to 7.1, a jailbreak is no longer supported.

Is there a FAKE Otterbox Preserver case for iPhone 5s?

I want to buy an Otterbox Preserver case from someone, the case with Touch ID compatibility, and he's selling it at $20 (Around 16USD cheaper)lower than retail price. The thing is, I do not know if he is a trusted seller, although the case looks pretty good to me.

Does anyone know if people have released FAKE versions of this case? If you do, can you tell me how to spot the difference?