How to get iPhone jail broken?

I have an iPhone 6 on iOS 9… I have never done this before and wanted to know the pros and cons about it? Also any links to videos on how I could have my phone jail broken?
Also I have a strighttalk monthly plan on my phone could I still add $$ to my account like I do every month?

You can't

The latest jailbreak is iOS 8.4, iOS 9 doesn't have an official jailbreak yet

As for the pros and cons:

Pros:
- Custom themes, tweaks, apps etc
- Somewhat added security
- Able to have access to things Apple don't allow, such as modifying icons, the way the clocks looks etc
- Overall, freedom. Apple restrict you on a lot of things, jailbreaking gives you freedom

Cons:
- Can't update your iOS until a jailbreak for that version has been released
- A risk of getting malware, this isn't an issue if you don't do illegal things like pirating apps, music and movies.

Can't jailbreak iOS 9.

  • What will happen if I use itunes with a jail broken Iphone? I have an Iphone 3s which was recently jail broken via a system called cydia in China. I haven't clicked on the cydia app yet i only jail broke it so i can put my Australian sim card in it. When i connected my iphone with itunes it attempted to 'restore' but i unplugged it. So what will happen to my phone if I connect it to itunes? Will it corrupt it? Full details please! btw i paid for some guy to jail break my phone so i have no idea about cydia
  • My jail broken iphone won't work? So a few days ago I downloaded envasi0n & jail broke my iphone 4.It worked for the first day or 2 then it crashed & it kept saying exit to safe mode. I was finally out of safe mode but the jailbreak still wouldn't work. But cidya & all the other apps I got from cidya were still on my phone. I re jail broke it today & now it won't get off of safe mode.
  • Metroon (windows 8 software) on jail broken iphone? Basics on it. Does jail breaking make iphone slower? Does Siri still work? If you have metroon is it slow fast good bad? Tell me about it
  • Jail broken sprint iPhone 5? Ok so I know the jail brake for the iPhone 5 is coming out, so I have a T-mobile plan and I've recently got an sprint iPhone5 basically my question is will I be able to use my T-mobile service on the sprint iPhone 5 since the jail brake is coming. Will I need to buy one of those chips that go into the SIM card tray such as the r-sim7?