What's thece between jailbreaking and unlocking an iPhone?

And what benefits you get from each action?
Which one will allow you to use a different carrier?

Both will actually allow for switching to a different carrier, except when Jailbroken, unlocking will cost money but there are many MANY (almost infinite) customization you can do to you iPhone. Unlocking the legal way costs money as well but you have to wait for your contract to end while a jailbroken phone can do at anytime. Illegally unlocking is of no charge and anytime as well, but you may still have to pay to your old carrier. And if you don't know, you can do both.

"thece "?

Jailbreaking will help to use other company applications and it will void your phone warranty. But unlocking allows to use different carrier Sim on your iPhone.Personally i needed to use different sim on my phone, So i unlocked my iPhone using Remote unlocking method. I bought an unlocking service from http://www.mobileunlocksolutions.com/apple-iphone/rs5wp9/ I never had any problem.

Jailbreaking is basically hacking iOS which would allow you more control but also make the phone more vulnerable to viruses

Unlocking is removing the 1 carrier restriction the phone comes with so that you would be able to use it on any GSM carrier in the world.

Jailbreaking is basically hacking iOS which would allow you more control but also make the phone more vulnerable to viruses

Unlocking is removing the 1 carrier restriction the phone comes with so that you would be able to use it on any GSM carrier in the world.