what jailbreak should I use to jailbreak and unlock my iPhone 3GS on 4.1.2?

If you want to jailbreak your iPhone 3GS, You can get the jailbreak guide from Absinthejailbreak.Com and to unlock your iPhone 3GS, You can visit Wickedunlock.com to get the remote unlocking service. This method of unlocking is safe, simple, affordable, quick and permanent. Free unlocking methods are not looking to be reliable. So you can better try with the method i have specified above.
 
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