if I jailbreak me iPhone warranty?

It will void your warranty.

Quoted from here: Unauthorized modification of iOS can cause security vulnerabilities, instability, shortened battery life, and other issu…

Apple strongly cautions against installing any software that hacks iOS. It is also important to note that unauthorized modification of iOS is a violation of the iOS end-user software license agreement and because of this, Apple may deny service for an iPhone, iPad, or iPod touch that has installed any unauthorized software.

-AJ

You are welcome.