Ok... so heres my issue. I recently cracked the screen on my samsung galaxy s3 sch-s968c. Luckily, or at least I originally thought, my girlfriend gave me her old verizon samsung galaxy s3 sch-1535 to use as a replacement. I found a good site here: How to Network Unlock Your Samsung Galaxy S3 to Use with Another GSM Carrier « Samsung Galaxy S3 which is appropriate because verizon is not my carrier. Unfortanately, the replacement galaxy s3 sch-i535 is running android version 4.0.4 and needs to be running 4.1.1 or 4.1.2 in order to unlock it as described in the site mentioned above. Can anyone please tell me how to update this phone (please remember that it does not currently have service, so "check update" doesn't work) to android version 4.1.1 or 4.1.2 so that I can unlock it? Thank you in advance for all your help!