I've had a rezound and my wife has one now.... For signal strength, both wifi and cellular, I haven't had anything that was as strong as the rezound. That was its best quality in my opinion. The s3 in general doesn't keep as strong of a signal as the rezound, but of course that's comparing two perfectly functioning phones. Yours was obviously defective in some way, so the S3 may actually be a step up in that regard. Now, in every other aspect I can think of yes, the S3 is a better phone than the rezound in every way I have compared.