Sony is beginning the rollout of a new firmware update for its current flagship, the Xperia Z2. The software (version number 17.1.2.A.0.314) doesn't bump the underlying version of Android, which was already based on KitKat. Instead, Sony is cleaning up the rough edges.


Here's the changelog for the 17.1.2.A.0.314 firmware.

  • Enhanced voice call quality
  • Improved touch function and performance
  • Charging improved when battery is low
  • Overall performance and stability improved
  • And all of our latest bug fixes and improvements

As Sony is fond of pointing out, software updates happen at different times in different regions, so you might not be getting an update just yet. Your carrier can also delay things. Although, the Z2 is still not officially on sale in the US, so there are no "hands-on" carriers dragging their feet on updates. Just give it some time and the update should appear.


Ryan Whitwam
Ryan is a tech/science writer, skeptic, lover of all things electronic, and Android fan. In his spare time he reads golden-age sci-fi and sleeps, but rarely at the same time. His wife tolerates him as few would.

He's the author of a sci-fi novel called The Crooked City, which is available on Amazon and Google Play. http://goo.gl/WQIXBM

  • Cory S

    Anyone have any experience running an imported model on T-Mobile? I've heard imported phones often have radio glitches with US carriers even if the bands are compatible.

    • Justin W

      Well, I'm running an import Z2 on StraightTalk w/ AT&T and have had no issues. I've previously had a Note 3 import (from Telus in CA), and that worked fine on AT&T as well.

    • Danial

      So far I have 2 of them working good with T-Mobile and I live around D.C and I have good coverage and most of the time LTE.

    • andddlay

      When I was on att it was great. But when switching to t mobile in an excellent coverage area, I usually get one bar.

    • Vishnu Vadlamudi

      I have the Z2 on T mobile here in the bay area and have no issues with the radio whether it's on 3G LTE or otherwise. Also tethering from the phone doesn't show up in my tethering data, though I hardly ever use it.

    • Ambroos

      Make sure you check the versions. There's a D6502, D6503 and D6506 all with different bands supported. D6503 is the standard European one and the most common, the 02 variant might work on more bands in the US (besides Sprint and Verizon of course)

    • TruthCrusader

      No issues on T-Mobile. Not sure where you heard that, because if the band's are compatible it'll work. Typing on my Z2 now.

    • http://www.facebook.com/lucyparanormal Daniel Tiberius

      I've been using my Z Ultra from Hong Kong on T-Mobile in the states since launch as well with no issues. Just make sure you get the right one and you're fine.

  • Elislurry

    Now it just needs to hurry and come to Verizon!! I am hoping the rumors for an August release were legit.

    • someone755

      Wait ... you can't -- You can't be serious about this can you?
      Verizon still doesn't have a "Big OEM" flagship months after release?
      If you aren't serious, you made my heart stop for all the people on Verizon for a moment.
      If you are serious, let me be very clear on this; GET THE FUCK OUT OF THERE

  • cr0wnest

    Updating my Z2 now! I gotta say Sony is pretty swift when it comes to updates.

  • Gerjannn

    That's great! Hope it'll be a little less warm now when doing heavy stuff. Even filming in 1080p makes the device hot as hell. But I'm still glad I chose this phone over the G3 and M8 :)

    • XDAMM

      Does it throttle when you're gaming? I'm really interested on getting this phone but I don't want it to throttle when playing games or recording 4k videos.

      • Ambroos

        During gaming: no, or it's not noticeable. On the Z I did notice it.

        During 4K recording: no, but recording will stop after about five to ten minutes of continuous recording because it raises temps too high. It's a gimmick, it's not like people have 4K TV's to play them back.

        • Cory S

          Maybe not. But being able to zoom in to 1080p would be legitimatetly useful.

  • andddlay

    My z2 is rooted... Must I unroot it before doing this update? Extremely happy that they worked on the voice quality

    • Anaron


    • abobobilly

      Well its not difficult to Unroot. So do it, update it and Root it again.

  • abobobilly

    I have a question about Z2. I remember i saw an "Answering Machine" somewhere in Z2, while it was introduced back in some Mobile Conference. If anyone has an experience with it, please come forward.

    • Lamka

      1)when u want to answer the call,u just bring the device to ur ears..
      2)u just shake the phone if u want to reject the call.
      3)just place the device face down if u want ur z2 ringer off..:-)

    • http://technocrate.net nailerr

      Yeah it's a function since launch. Under Call Settings you can enable it, record a message (or several) and define a pick up time period. It will answer after defined time, play your message and record the caller. The messages are playable from the call history although unfortunately deleting them requires digging back into the settings. Nonetheless it is a very handy function for those of us who dislike using carrier voicemail.

      • abobobilly


        I wonder why other manufacturers are not including such feature. Even ASOP isn't, and AFAIK we don't have a proper Answering Machine app in Play Store as well.

        Voice Mail days now feel like stone age days, and "On Device Voice Mail, with an Answering Machine to Support it" would be a BRILLIANT choice.

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  • SK

    now how do I buy this in US with a warranty?

  • jason

    Just purchased an unlocked international z2, d6503, I am getting pretty bad signals all over town and inside, I had the original z and it had full lte everywhere. Any suggestions to improve this?

    • Adrian

      I too purchased a Z2 (on O2) as my business phone and the call quality is embarrassing, constantly fading in and out. It has been back to the shop and they "replaced the microphone, which was faulty".... but still exactly the same. I have probably spent half of my time using my old iPhone 4S. I wish I had stuck with Giff Gaff... same carrier, I know, but even on same phone seems to get better reception.
      Will be changing provider and going back to Apple on next release if this doesn't sort out the primary purpose of the Z2... it's a phone not an underwater camera / speaker

  • jason

    I also forgot, I am on tmobile, and I see there is a update 17.1.2.A.0.314, will this update the basebands or improve my signal. When I had my xperia z and it updated to 4.3it was like a new phone and had excellent lte inside and outdoors with 25-30 upload and download. Any advice, thank you

  • alister2310

    I got an issue after that update which is i cannot make phone calls because after nearly 30 secs the call cuts off..I've changed my sim and did everything i could but it's still the same..PLZ HELP!!

    • Matthew Burton

      I am having the same problem. Have you managed to sort it out? If so how??