I upgraded my phone from a Droid 2 to the Droid Razr, and now im NEVER getting signal.
If you live in a 3G only area, switch the phone to CDMA only mode under the network settings.
If not, please post back with additional information of what you are experiencing.
One thing to Add to this: An i was told this by an Assistant Manager at a Corp. Store that the Signal Strength Bars Doesn't always need to be Full as long as your 3G or 4G indicator is showing you should be able to use your phone. If your 3G / 4G is not showing up however than i would contact CS an ask to be connected to a Tech to Help you out. Or go to your Local store for Help. B33