I pre-ordered on my husband's upgrade hoping that this works. 1. Put his sim into GS4 and activate. Maybe make some calls for good measure. 2. Yank his sim and put it back in his Galaxy Nexus. 3. Put my GS3 sim into GS4. If anyone else is successful with this before the phone arrives on Tuesday, let me know. :biggrin: Or should I just take it to the Verizon store and ask them to do it?