I've always had Samsung phones, but after comparing the specifications on GSM (As always) between the S5 and Z3 mini's, I dubiously made the switch to Sony! After 3 weeks I feel ready to review. In a nutshell, Sony has better Hardware, Samsung has better Software. It's a trade off, and i'm still not convinced I made the right choice. I need my smartphone for: Taking pictures, Watching videos, Surfing net, texting and phone calls. Hardware: Even though the camera spec is higher with Sony, In auto mode, it's preset to 8mp. Compared with 20mp in manual, i find i get better pictures in auto mode. But in auto, i can't change to 4:3 from 16:9. I prefer 4:3 as i like my pictures developed in 6x4. I can take videos in 4k but not Photos. 4k video is excellent, but watch out for file size! Of course 4k take more memory. Dedicated camera button is a nice touch. Gladly, Sony have kept their trademark Flash light feature, which uses the camera flash as a torch. (Just like on my old Sony ericsson phone from years ago). I use MX player to watch videos. It's the best video player app in my opinion, though it does use up battery quickly, I find I still get around 2 days use between charges. Internet is fast, call connection is fast, opens app's fast. Sound quality is not as good as i'd hoped. Stereo works well, but turn up the volume, and you'll get distortion. Didn't have this problem with Samsung. (Not an issue with headphones plugged in of course). Software: Samsung is more intuitive and much more personable. Sony's text messenger service looks very uniform and boring. You cannot change the phones font styling, I had to select which language to load into the dictionary before I could start using text, Sony is full of software i don't need or want, (Calculator, Calender, Alarm are all boring and not intuitive, they feel awkward to use. Their is no organizer, I find i'm having to look for app's to download, to run basic services, that come as standard on the Samsung, and that 'Just work'). Using the phone to make calls and view contacts feels awkward (Though, that could be because i'm used to Samsung). Samsung feels better in the hand. And one last point, when I want to charge my Sony or transfer files onto it. I got to take the S-Line gel case off every time, so i can open the waterproof flap, to connect the cable. It's annoying! (Phone is smooth like glass and slippery, I need a gel case otherwise i'll be dropping it all the time). I've noticed the Sony occasionally will not auto-rotate, and freezes after copying files to it. Like I said earlier. In a nutshell, Sony has better Hardware, Samsung has better Software. It's a trade off, and i'm still not sure which phone I prefer. Hope this helps :)