Has anyone jailbroken iphone5 before?

Hi. I wonder if anyone has - no problems after jailbreaking such as crashing, slowness, lower battery life etc.
My iphone is on 6.0.2 version, still under one year warrenty. I want to find the best app to jailbreak without removing my contacts, photos, docs, music files etc.

Why does my IPhone randomly play my message tone?

It's an iPhone 4, I've had it for around 3 years and its started not so long and doesn't happen everyday or week even, just occasionally
I'm not sure if it does when I'm on it or just at anytime, I mostly notice it when I'm on it, but I believe it might of happened when I was not using it
Is it broken? Does this happen to other people iPhones?

Iphone vs android which one is better?

I don't get it iphone 5 cost alot and android is cheap but android's specification is better than iphone 5.
What's so special about iphone that makes it expensive when its not better in performance than android.

IPhone 4 software update to ios 6?

I have an iPhone 4 on iOS 5.1.1. I want to update my phone to ios 6.0.1
My prob is that I hav installed cracked apps on my phone using jailbreak ( installous) And I'm afraid that i will loose all my apps and the data if I update my phone.
Please tell me how to save the apps and safely update my phone to ios 6.
Thanks.

Added (1). What if I want to restore it iOS 5.1.1 only?
Can I backup my apps on pc and reinstall them after restore or update?

Can a verizon iPhone 4 work on tmobile?

I recently switched from Verizon to Tmobile but had my GS3 stolen. I still have my iPhone 4 from Verizon but will it work on Tmobiles network?

Added (1). Any suggestions welcome