Jailbreak my iPhone 4 ios 6.1.3?

Is there any websites, downloads… Anything I can use to jailbreak my iphone 4 ios 6.1.3? Every other blog spot i go to they say you can. But then the next blog says you can't… I tried to downgrade to ios 6.1.2 but I never saved my shsh blobs.

Added (1). Also it is a Verizon phone (cdma)

Added (2). AND i have tried evasi0n, it says my ios device is not supported.

Why the *** have you got a iPhone, they are ***

Evasion. Its a tethered jailbreak