Unfortunately, this seems to be a pretty common problem. It happens to me as well, although since the 4G outage yesterday, I don't think it has happened since <knocks on wood>.

Terrantula

 

Here's what I put in one of the other signal issues post (mine does seem to drop out a lot):

I live in an area where there is no 4G at all so I keep mine in CDMA only. My past phones normally hover around -88 dBm while this one frequents -100 -105 dBm. About every 30-45 minutes the signal will drop to -120 dBm 99asu and the phone will not connect to data at all for about 5 minutes until the signal goes back up to -105 dBm. I also notice a weak wifi signal as well. Sitting less than 20 ft from my router shows 1 bar and sometimes just the little blip at the bottom. I haven't paid attention to the dBm for the wireless yet but I will next time.

Sitting side by side with my work iPhone, the nexus drops signal while iPhone still has full bars. And speed tests side by side normally result in much lower results with the nexus as well. iPhone will be getting anywhere from 700 kbps - 1 mbps and nexus will be 200 kbps - 400 kbps.

 

My GNex data connection has been somewhat temperamental, but getting more and more stable over time it seems (~36 hours now). I'm in a sort of borderline 3G/4G area, but both seem to work. Not yet bad enough to warrant a return though... fingers crossed.

So far, though, the radio on my BB Storm 9530 was less testy, although that radio/data-connection was pretty bad at times too.

 

Another factor:

New Verizon data outage reported across US

 

That was yesterday morning

 

Yeah - so were some of the posts - I JUST got my 4G back, I had 1x this morning. (on a ThunderBolt).