I've had this Verizon Galaxy S4 a few weeks and I've noticed a few bugs.
1. When I use the Google Search app, which is more than half of what I use my phone for - I like to learn about things, the results always come back in the wrong browser. I use Dolphin as my default because the stock browser is missing many, many important features and settings, yet search results always come back in the stock browser. This is frustrating because every time I follow a link that doesn't satisfy my search, I have to either remember to go directly back to the results from Dolphin, long press the Home button to access the terrible task manager and hunt through the open programs to maybe find my search results, or do the search over again. It's either a boneheaded oversight or yet another despicable example of how very much Google hates people who don't slavishly conform to its vision of the average user. I am assuming the former because the latter is a THICK file, indeed.
2. As mentioned by someone earlier, the transition animation setting in Developer Options repeatedly resets to 1x from my preference, 0.
3. The Samsung notepad (SNote?) program has a colossally short "canvas size" of about one page, rendering it useless for all but the very shortest, incomprehensibly succinct notes.
4. It doesn't seem able to send or receive photos via MMS if mobile data is turned off while connected to WiFi, even though everything else functions properly at the time. If not a bug, this is some twisted ploy to further frighten anyone who doesn't have unlimited data.
5. Bluetooth doesn't work as well is it should. When connected to my Outlander's car stereo via Bluetooth, it plays music fine via the rdio program, but I get no info on the dashboard display. My iPod, via Bluetooth in the same car, provides song titles, album, genre, etc running rdio, and connects much faster besides. I guess locally stored MP3s played with the phone's stock music player do show the info above, but I can't think of any other reason to use that program when rdio has a much larger selection and is the only music program I envision ever using.
6. Google Now. After I set it up, I tried launching the Google Search app, for which I have a shortcut in my dock to replace the SORELY missed Search button that has been senselessly, belligerently left off this phone... sorry, where was I? Oh, yes. When I'd launch the Google Search program after setting up Google Now, it would launch, but the keyboard wouldn't appear automatically, making it necessary to touch the text field to show the keyboard and perform a search - a maddening, senseless extra step. Disabling Google Now fixed that.
7. I type a lot, so of course I don't use the weird QWERTY style keyboards that come with smart phones and instead use Smart Keyboard Pro, a keyboard that shows the others to be appallingly primitive, and which has an excellent T9 numberpad keyboard. I've been using it for, what?, five years? Four? Anyway, this is the fourth phone I've had it on and the first one with which I've had any trouble. Random words get capitalized and I am repeatedly forced to either be EXTREMELY rude and disrespectful to my reader by allowing typographical errors to remain, or correct said errors each time. Further, T9 is always disabled when I enter text in the "To:" field of the Gmail app, making email a lot less convenient.
I am an experienced Android user. I've had an Android handset since the Eris was very new, but I've never used a Samsung device. I love this phone more than I knew I could, and I don't mean to sound dissatisfied. I hope these items are simply results of my ignorance and easy for you knowledgeable folks to advise.
Thank you,
Matt