How to jailbreak on a iphone 4 6.1.3?

I want to jailbreak my iphone 4 6.1.3 if anyone knows how to jailbreak can you tell me i don't know what website to trust please i want to jailbreak my iphone 4.

In the US, jailbreaking is not currently illegal. Unlocking, however, is.

Jailbreaking will void any warranty, forfeit any right to support, and could end up bricking your phone.
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Go to youtube. Search up iCrackUriDevice he knows everything. His downloads should be in the subscription