My Droid Razr Maxx was updated this morning and right away found a couple of problems. First, although I was sitting next to my wireless router, the signal display indicated a really weak signal. This seemed to clear up after a reboot and an on-off-on cycle of the wifi on the phone.
The second problem was that, with the wifi off, I had no data signal. None. The phone worked but no 1x/3G/4G. I traced that problem to the phone configuration. Somehow the update turned off Mobile network data access. (Menu -> System Settings -> Wireless Netwroks -> More... -> Mobile networks -> Enable data access over mobile networks)
Seems like a dumb thing for the update to do.