You have 3 options...
1) Remove battery and sim card. Then replace battery only and power up. Power down, remove battery, replace sim card (& battery) and power up. Be sure to put the sim card in correctly (see Post #18). Take a look at https://motorola-global-portal.custh...-card-swapping where it says "In the event you remove your SIM and replace with another SIM card, you may experience a disruption in certain services like OTA (Over The Air) updates and social networking services."
2) Do a Factory Reset. Many people have done this and gotten the update right away.
3) Install the update manually. There are several threads on where to get the file and how to install it.