well first I need me your generation of iPod touch let... but than let versions more desirable (the untethered jailbreak) all iPod touchs
iPod touch 1 g 3.1.3 (is the last for this generation)
iPod touch 2 g 4.2.1 (is the last for this generation)
iPod touch 3 g 4.3.3 (not settlement 4.3.4 and 4.3.5!)
iPod touch 4 g 4.3.3 (not settlement 4.3.4 and 4.3.5!)

good for iPhones is the same, also let the Progranas, can the jailbreak with these versions:
iPod touch 1 G 3.1.3: spirit
iPod touch 2 G 4.2.1: Greenpoision or Redsnow
iPod touch 3 G 4.3.3: http://www.jailbreakme.com/
iPod touch 4 G 4.3.3: http://www.jailbreakme.com/

You have other questions send a me MP
Best wishes

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