Samsung Galaxy SIII Weak Data Signal

I upgraded from an HTC Thunderbolt that I used to be able to stream Pandora, iHeartRadio, etc. while sitting at my desk at work without any problems but with the new SIII I can't do any of that.  I also notice that switching form 3G to 4G (3G inside my office to 4G outside) is unbelieveably slow and can't take 10 minutes or more to switch to 4G.  On top of that, while I'm at home the wi-fi signal is atrocious.  Sitting next to my wife's Rezound showing the best wi-fi signal reception that it can get my SIII won't even show a wi-fi signal.  Most of the time I'll have to turn wi-fi off and on several times to get the phone to see the network. 
I know Samsung phones have historically had signal reception problems, even as recently as the Nexus, but this is just ridiculous.  Hopefully it's just a software issue that can be fixed via OTA update but Verizon isn't exactly known for pushing out updates in a timely manner.
In the meantime I'm stuck with a *** phone that can't do half the things my old Thunderbolt used to be able to do.  Maybe I'll just sell the SIII on Ebay and buy and old Rezound (now getting ICS) or a Moto Razr Maxx. 

The S2 I owned had perfect data connection, even in areas of poor coverage, and superb WiFi connectivity.  The S3 operates identically.  I'd suggest a factory reset to begin, and a replacement if that doesn't resolve the issue.  I don't think your experience is typical.

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