Verizon LTE phones take longer to activate sometimes because of something to do with the sim card. Nothing to worry about.

 

The Verizon rep told me when he was activating my phone that the first time fails but then a battery pull and it works like a charm.

 

This is what they did for me as well. While setting it up she waited for it to start activating. While it was trying she pulled the battery then put it back and restarted the phone. It activated in about 15 seconds after that.