How to jailbreak iPhone 4S, with iOS 9.2.1?

I have an iPhone 4S, but I use it as an iPod. It's running iOS 9.2.1 Is there a way I can jailbreak it with a computer using iTunes?

Added (1). I read there's not a way to jailbreak iOS 9.2.1 but can I still jailbreak it using like a iOS 9 jailbreak?

Music on iPhone slowly disappearing?

Over the last several years, I've downloaded a good amount of songs on my iPhone, but for some reason the songs have slowly started disappearing. They were all songs that I had downloaded to my computer that I then transferred to my iPhone. Some days they will all be there, but today I noticed that the only songs on my iPhone are now the ones I have purchased through iTunes.

IPhone not connecting to iTunes anyone else?

For the last 2 months I believe? I have not been able to sync any of my apple devices to iTunes. The computer pops up that there's a device and the phone charges and all that but it does not come up in iTunes at all. I recently upgraded my iPhone 6 to the 6s plus and it still does not connect. I have tried uninstalling iTunes and reinstalling it, I've updated my phone to whatever the newest iPhone update is, my computer is up to date with the most recent Windows 10 software, I've even gone into to apple device support in the computer and everything is functioning as it should and none of it has worked. Is this just a bug in the DNA? Are others having this problem?

What's your position on Apple being forced to making it possible to open locked iPhones?

Apple will have to create a new operating system to open locked iPhones.

Do you think this should be done?

Would you sacrifice the security of your phone and other peoples phones for this reason?

Added (1). The worry is not about THEM getting into your phone… Geez. Of course not. Lol It's about it now being possible for it to happen which means OTHERS may possibly be able to. As of now, APPLE can can crack your phone.

Added (2). Note: They would be rewriting the operating system to enable 'hackability' basically. They're not hacking this phone individually.

Added (3). They are not currently able to hack anyone's iPhone. The operating system (which you will also download eventually) would be rewritten in order to enable phones to be hacked, broken into by other people besides the government eventually.

How much data does Maps on the iPhone use?

I only have 3GB of data on my iPhone so I would like to know approximately how much data I would need for a four hour trip or so.

In addition if you know, let me know of other GPS apps that use less data.

Grestly appreciate it!