Android 4.4.2 KitKat update on its way for the T-Mobile Xperia Z1s?


Being on T-Mobile can often mean software updates coming a little later than they do elsewhere in the world, or sometimes on other U.S. carriers. Having been released late last year, the Xperia Z1s is yet to be updated to Android 4.4.2. But that could be about to change.

XperiaBlog reports on some findings online at PTCRB showing certified software versions. Firmware build 14.3.D.0.183 was certified last month and could be set to roll out later this month for Z1s users on the Magenta carrier. This follows on from two previous builds, 14.2.C.0.126 and 14.2.C.0.159, both of which were certified at the end of 2013.

Of course, there’s no official word on its availability just yet, but we’ll be sure to let you know when/if it arrives.

How are you Z1s users feeling about your devices? Are you happy with them? Do you wish you’d gone with a ┬áSamsung/HTC instead? I’ve recently picked up a Z2 myself and have been pleasantly surprised by it.

Via: XperiaBlog
Source: PTCRB

Tags: , , , , ,

  • kenneth arnold

    Very old news

  • sushimane

    For me personally I would still enjoy it. Samsung is the worst in my opinion I had the note 2 for a year and nothing happen no update what so ever but from what I read a month or so ago seeing the note 2 being update to 4.3 unofficially. So I basically scrap the note 2 for a nexus 5 best thing I ever done. But second had to be lg I had the g2x the phone was a nightmare random reboot/shutdown no update.

  • substance

    Love my Z1s. Of course I would love it even more if kit Kat was available for it.

  • Verizonthunder

    Hello what about those who purchased the Sony Xperia Z??? International version is at 4.4.2? While T-Mobile version stuck at 4.2.2! A friend of mine has this smartphone and keeps asking me when will a update be available?

    • thepanttherlady

      Yes, 4.4.2 out of the box.

      • Verizonthunder

        Uhg it’s s sad shame on you T-Mobile

        • thepanttherlady

          My Z1 from the UK also received the update.

        • Verizonthunder

          Not surprised i am not blaming Sony this is tmobile fault and possibly ruining the Sony usa market share

        • fsured

          This is T-Mobile slacking for sure. HTC, Samsung, or LG can drop an update and in short time it is certified by T-Mobile and pushed out. Saw this happen with updates to 4.3 and 4.4. Sony has released 4.3 for the Z almost 5 months ago. They do not have anywhere near the type of customized overlays that the other OEMs use on Android. I’m not sure why it is taking so long. Some say it’s the baseband that they have to get working but really, 5 months? These are premium phones and deserve the same attention to releasing updates like the other 3 companies.

          It’s like they took the product and milked it for customers and don’t give a hoot about updates since sales volume isn’t large. Not exactly the way to retain customers who like a model line and it does hurt Sony. Last week I was with a friend as he was signing up for service and was eying the Z1 hard as my upgrade from the Z. I’m at my Jump! upgrade point but hate how they are treating Sony phones. It has me thinking twice. That was a double sale the store and rep could have made.

    • KeepCalmandTweakOn

      There’s always the option of flashing the firmware for European version while keeping the T-Mobile baseband for the original, isn’t there? I did the opposite with my international Z1; kept the 4.4.2 firmware but flashed the baseband from the Z1s. It worked like a charm!

    • kenneth arnold

      The z1s launched with 4.3 btw

      • Verizonthunder

        You do realize I was talking about the Sony Xperia Z right??? Please read carefully next time

        • kenneth arnold

          Well considering the article is about the z1s a phone that is well over a year to old didn’t really cross my mind but thanks for hijacking please stay on topic next time

        • Verizonthunder

          It’s relevant to this subject and I am not alone in the inquire about the Sony Xperia Z. Next time read before responding so you will not embarrass yourself.

        • kenneth arnold

          I’m very aware that you didn’t start the hijack but continuing it doesn’t make it right

        • thepanttherlady

          It’s a valid question and much more relevant here than on the other recent articles.

        • Timbo1

          the Z1s is not over a year old! The Z is though.

        • thepanttherlady

          He means cell phone years. :p

  • Scott Erckman

    well, this makes the phone more interesting now. Even with the unlockable bootloader, I may still check this one out as a second phone.

  • Stone Cold

    Mixed emotions I want kit kat 4.4 but don’t want the SD change.


    That is Great News My Z1s is a good phone and trust me I own many phones like LG G2
    and HTC ONE M8 etc…
    My Z1S works great but the update would be nice and when I am swimming down the creek with it I can snap some great pics. YES fully Waterproof!!!!

    • yankeesusa

      Yea, I was in the pool on vacation just the other day and my wifes z not the z1s did just fine in the water. Only problem is no dedicated camera buttong.

      • thepanttherlady

        The Z1 has a dedicated camera button, the Z did not.

        • yankeesusa

          Sorry, I meant z

  • Z1S User

    The Update Center just updated itself for me yesterday. Hopefully that’s a good sign. I really want to play around with the google camera on the ZIS.

  • mmunson

    If I don’t see 4.4.3 by August i am likely jumping to an iphone 6 or HTC One M8.

    • dee

      me too, its so frustrating. I chatted with t mobile yesterday. the engineering department has the update supposedly. they checking for bugs and other issues. that is what they told me so who knows maybe we get it soon.

  • Dmrubio86

    Pretty happy with my Z1s. Waterproof and 20.7 megapixels is what sold me on it, over Samsung, Htc and LG. All I need is a kit kat update.

  • yankeesusa

    What about the z? I already got rid of my z because of that. My wife doesn’t care about updates so she still has hers but I am reluctant to upgrade her to the z1s since it has no new updates.

    • thepanttherlady

      My Z1 (international unlocked) received 4.4.2.

      ETA: Since you edited your comment, I will do mine as well. The Z is slated to get 4.4.2 this month, internationally. I do not know about T-Mobile’s release date.

  • Parker James Gurney

    I’m definitely Jumping to iPhone 6 in August. The Z1s is my first Android and I am so very displeased with the update availability and neglect. Thinking twice about T-Mobile as well after switching from AT&T.

    • fsured

      The neglect is T-Mobile. Sony updates their products but the carrier needs to approve it before releasing it to their customers.

      • zach

        The only reason why T-Mobile doesnt update the z1s right away is because the tmo version has wifi calling which takes more time to integrate with kitkat

    • Stone Cold

      Give a different Android device a chance unless you have had an IPhone before.

      • Parker James Gurney

        I have always had an iPhone. Last month my wife convinced me to try android and so I got the Z1s.

        • Stone Cold

          Ahhh I see

    • Timbo1

      unfortunately Tmobile locked the Z1s down tighter than a….on a different regard you just cant beat the customization of android vs. iOS. I tried iOS for a little bit an quickly changed back to android, have not picked up my 5s in months, way more options on android and not “dumbed down” like iOS. My enjoy my international Z1 way more than boring iOS but that’s what opinions are for.

  • Angelo Lewis

    I had a HTC one and switched to a z1s right after my one got the KitKat update. I switched because the Z was waterproof. I love my Z I just wished it got better update support.

  • Mark

    How about the KitKat update for the Z (C6606)?????

    • thepanttherlady

      May or June according to Sony.

      • Aaron Gooch

        Dec or January

  • ERK

    I’ve had the International Z1 (C6903) on T-Mobile US with LTE support since October. The experience has been superb. Being unlocked and rooted, it’s the only way to go. Carrier branded Xperia devices (especially US ones) will always have a locked bootloader. Don’t buy these if you want full freedom! My Z1 has 4.4.2 update, and while being rooted there is a workaround for the ‘write to SD card issue’ that comes with the KK update (thanks Google, sigh.) I had the T-Mo US Xperia Z also and found out the hard way about the lock bootloader. Never again! As most of you all ready know, just head over to the XDA forums and fill up on all that awesome info. pssst! Rumor is, there is a way to get root on the Z1s, but those exploits won’t be released until after Black Hat con in August. #TMoLuv #SonyZ1Luv

  • james

    little tired of waiting for updates but the build quality and experance is great no samsung for me lg g3 maybee

  • johnyboyluzig

    Freaking Note 2 update is taking forever…..ridiculous.

  • Kendahl Titcomb

    I think what so many forget is the Xperia Z1s had features built in that the other xperia phones got in the Update. I love my Z1s and my wife has the GS5 and she still has times that she picks up my phone and smiles because of its build. Its an amazing phone and the only thing I’m looking forward to in the new update is a few tweaks to the WiFi and Bluetooth issues that come about from time to time.

  • Anyone here have the newer Z1 LTE (unlocked international version)? Model C6906. I’m thinking of selling my LG Optimus G Pro for one of these in white!

    • thepanttherlady

      Sorry, no trading or selling on the blog please. Thank you.

      • I’m not trying to sell on here :) it was just a comment. That’s what Swappa is for!

  • Kiubaza

    Any one have the inside of the screen on the Z1s just crack on them? Mine was in my hand when all of a sudden the screen stopped responding then started to notice about five cracks go across the screen starting at the edge by the power button then going across the screen. T-Mobile next day shipped me a new phone for only for bucks but I’m worried the new phone will do the same.

    • CapnAHav

      I am one to drop my phone fairly frequently. So far so good. But I do have a case on it.

  • CapnAHav

    Love the hardware. I think Sony is the best in the biz in that regard. Switched from 6 years of iPhones on AT&T. However not having basic functionality like volume control on a head set makes it feel like i stepped back in time a few years. If the iPhone 6 was out today id go back in a heartbeat. Thankfully i cant switch until June so ill be forced to at least try KitKat before jumping ship. But between the lack of some important features, a badly placed microphone (on the back so its muffled if I lie the phone down to record a guitar idea) and frequent crashes causing the phone to reboot at inopportune times, I see another iPhone in my future. Also why is there no halfway decent instrument tuner on Android? My iPhone had like 6 and they all worked brilliantly but every version on android paid and free are borderline unusable. (although that could be due to poor mic placement also)

    • Parker James Gurney

      I’m with you. Jumping ship to iPhone 6 once it hits the market. Haven’t had a good experience with droid at all.

  • Tony Roig

    Laughing so hard right now… I’m leaving this phone if I don’t get an update… Hahahaha… The Wahmbulance is on its way for you. The Z1s is an amazing phone. It does any and everything I want/need it to do. An update will be nice. But start saying I’ll switch carriers before phones, this is TMOBILES fault… I will never touch any other carrier but they are always slow with updates. I’ve had HTC, Samsung and IPhone and all fall behind on updates, thx to TMOBILE. So get a clue, grip or whatever but don’t think Xperia is not as good, since this is a great phone. And IMHO the BEST phone.. Screen amazing, power amazing, battery life amazing better then my Gs4 was by 4 hours, connected fast, plays any game I want and looks great when played through my projector.. You want a great phone then this is it. You want less than great then switch…. Good day…. I said good day!!!!

  • Jesse

    I have really enjoyed the hardware on the Z1s. Coming from a BlackBerry Z10, I have been disappointed by Android as an operating system however. I have been really looking forward to the KitKat update to see if some of my Android quibbles are resolved or maybe just look prettier so I don’t mind so much. In any case, an amazing phone by Sony and has done everything I’ve asked it to do. Love the battery life, the screen, and the waterproofing, just still not totally sold on Android.

  • Nico

    It’s almost July and it’s still not out. -_-

  • Bob M Maize

    Sony gave kitkat and tmobile approved since April 2014 and now its tmobile is the one who is holding up the release of kitkat to the z1s. why is tmobile waiting for the launch.

  • ken

    Still waiting for the 4.4.3 update for the z1s. I did get the 4.4.3 update on my tablet Z this month. Come on t-mobile!

    • Sasuke

      isn’t on all t mobile phones or only the z1s? because I’m planning on getting the z1s this weekend?

      • ken

        Still not on the z1s but Sony just released another sw build for the z1s on T-Mobile. Should be available soon.

      • ken

        I’m not sure about other T-mobile phones and 4.4.3. I’ve had my z1s for ~4 months and it works great. None of the problems reported above on my phone. Great display, Bluetooth to a portable speaker, wi-fi. I use google for contacts and photos, no problems.

  • Erica W

    I just switched to Tmobile sony z1s from galaxy s5 I feel cheated out of my money! I’m so unhappy. Had this phone less than 24 hours

    • Sasuke

      what happened?

    • ccrazeegyrl

      Going back to s5 Aug 20 when I can trade this in. 6mos too long. Hate it

  • Aaron Gooch

    Wish I would have gotten a z2 or something not this device nothing works right on it.

    • Sasuke

      whats wrong with the z1s?

      • Aaron Gooch

        Oh my keyboard disappears have to reboot to get it back. Then the phone randomly reboots. Bluetooth and WiFi doesn’t work at the same time . my HTC one works WiFi and Bluetooth just fine. Kinda defeats purpose of having T-Mobile WiFi calling . also data slows down have to reboot to fix it . so yeah I’d trade all these issues for battery life to be not as good