You can jailbreak ios 5.1 tethered on iPhone 4, 3GS, iPad 1, iPod Touch 4G, 3G using latest version of RedSn0w 0.9.10b6. I have given below the download links for redsnow 0.9.10b6 and complete step wise guide to jailbreak  iPhone 4, iPhone 3GS, iPod touch 4G, iPod Touch 3G and iPadContinue Reading