Xperia Z security flaw exposed as lock screen bypassed

by XB on 25th March 2013

in Problems, Videos, Xperia Z and Xperia ZL

Xperia Z unlockIt looks like the Sony Xperia Z (C660X) is the latest in a long line of smartphones to see its lock screen bypassed, posing a big security risk if your phone falls into the wrong hands. The bypass is easy to do and involves hitting the ‘Emergency call’ button when the lock screen appears. You then need to enter the appropriate codes (*#*#7378423#*#*) to enter the service menu, the same on all Xperia phones.

Once inside, click on Service tests > NFC > NFC Diag Test and then hit the home button. You can now browse the phone as normal. We have just tested this on our resident Xperia Z and can confirm the above works without any problems. The lock screen can’t be changed without knowing the passcode or pattern, but you can access all areas of the phone. Let’s hope Sony fixes this exploit as soon as possible.

Via GSM Arena.

  • Xperia S Android 4.1.2 Jelly B

    Xperia S Android 4.1.2 Jelly where?????????????????

  • Tested on my Singapore set with firmware .434 and it has this security flaw, at least it requires more steps than Samsung Security Flaws so hope Sony will fix this soon.

  • lovebmw

    how was that discovered?

  • xperiax10.awesome

    Cm’on grow up !!!!
    I have seen you crying everywhere in XperiaBlog for Xperia S JB

  • I’m more worry about the guy who invented this *#*#7378423#*#* code

  • Scott Reed (The person who made the video) answered that question on GSM Arena:

    I believe people want the software to actually be secure. I found this
    randomly out of curiosity from investigating rooting on this phone but
    the reason it’s publicised is the same reason you publicise scams, so
    people know to be wary and so the manufacturers fix it. I for one don’t
    want people accessing my phone and charging hundreds of pounds on my
    play account….that is why we have security screens

  • Venator

    Why? It’s made for easy access to places where you can repair your device, while at th same moment it’s hidden for the consumer

  • simon re

    *#*#7378423#*#* is just a numeric shortcut for *#*#service#*#*

  • *#*#service#*#*

  • i just tried it now in my Xperia S and thanks god didn’t work, it returns u back to the lock screen :P

  • ShinOrochiX

    Live with Walkman Jelly Bean? When?

  • I’m an idiot for trying to learn the numbers instead of looking at the letters. Thanks bro.

  • James

    It affects the Sony Xperia T as well, I have just tried it. It is running Android 4.1.2

  • Richard

    Tried on Xperia V running 4.1.2 – it worked briefly (a couple of
    seconds) and then flicked back to the lock screen. After that I had to
    use the unlock code to re-enter the service app

  • azmadu

    good thing I’ve not yet got my purple one. Maybe it’ll be fixed by the time mine is ready to ship from my pre-order. Should I consider cancelling my order I wonder?? Well I’ve not lost a phone in the past 13 years so, no I won’t. :-)

  • make.believe

    It works on my Sony Xperia V!

  • If you have root just disable ServiceMenu with Titanium and the Problem is solved at the Moment… but hope they’ll fix it soon

  • more steps but is moooore easy

  • I remember sony fan laughing to Samsung for same problem wiht S3/Note2

  • Bayhas Kana

    LT28i Ion is not affected.

  • James King

    Tried this on all my devices. Xperia Z, TL, and P have the security issue. Xperia S and ion did not.

  • lol it did on my Xperia s!!!

  • semo

    very soon according to the December 2012 schedule, must be in somewhere in April

  • Isn’t it stupid/paranoid to use all these locks?

  • juanfran

    no, the problem is only for the Xperia Z

  • Pingback: Une faille dans le Sony Xperia Z permet de déverrouiller le téléphone sans rentrer la sécurité | Les Solutions Open Source Business()

  • Doesn’t seem to work on my Xperia P. I’m using the Pattern Unlock though.

  • James King

    So was I. I am using firmware 6.1.1.B.1.54

  • James King

    Actually it affects more than just the Z but it looks like the S doesn’t have this issue.

  • James King

    Make up your own mind when you phone is stolen and the info you have on there is used against you. Lock screens and remote wipe capabilities are there for your protection. You don’t have to use them if you don’t want.

  • Amimanot

    It seems that any phone with jelly bean has this flaw, maybe this bug existed within jelly bean itself

  • Pingback: Xperia Z???????????????????? | Gadget Way()

  • alx

    if they fix this we’ll need a new method to root the device. The current exploit uses the NFC

    vulnerability too.

  • gavin1995

    Just tried it, it does work…oh well…I got another program for app lock…

  • afzal

    The code num for service test purpose.. Funny how easy it can be menuplate

  • Kalyan

    Even I did it & got d same result…. :)

  • Yip, my Xperia T also! (4.1.2)

  • Pingback: Sony Xperia Z ?????????????????????? – AYOU??()

  • Pingback: Sony Xperia Z ??????????????????????()

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  • Pingback: Lock Screen Bypass pada Xperia Z - CISO Magazine | CISO Magazine()

  • Mithfalath

    Im quite surprised it isn’t working on Tx so I’m quite relieved.


  • Pingback: Official Xperia Z Thread - Page 252 -

  • Yes, it is Anroid flaw and that shows how good is the coding for Sony compared to Sam Sung.

  • blu

    Hi, just want to share. I have totally removed the emergency lock in my experib z just type code 123456 and press okay then go to security to remove the security setup. Hope this helps. Thanks

  • Lakshan Bandarathilake

    Type this code (*#*#7378423#*#*) >>> Go to service test >>>>> and connect to WLAN through a wifi hotspot( its gets searched automatically) >>>>>and once connected to wifi you can enter the gmail info and get through the pattern easily>>>>>>Simple as that!!!


    how 2 remove pin password from sony xperia E….. bro plzz help me…………………

  • Tim

    does this work on the 4.0.4 firmware version somehow? i really need help. thanks.

  • Dhaval

    I tried by typing this code.. .. And i also tried by pressing volume dowm + power key…Nothing happens.. Plzz help me.. I want to unlock my xperia tipo.. I forget pin no

  • iqbal

    how to rimov patan paswerd

    xperia z

  • thomas

    Don’t work on my sony xperia z1

  • findwl

    Not working on my Xperia Z……

  • bloomsbury

    i ‘ve forgot my password to my xperia zl and already try that method its not working. it give me msg *#*#7374blbalba #*#* is not emergency number. so what should i do to access my phone.

  • bloomsbury

    help me if someone can pls feel free to email me at thanks so much for your kind help.

  • zhel

    how will i remove my password in my sony xperia ultra z c6833, i forgot my password now i cant use my phone :-( please help… ;-(

  • i have the xperia but try to rest, but i got (The NFC device can not be used) how i can solve it

  • M? HåBät

    hi i have a sony z2 how 2 remove its pattern i have forgot my pattern?

  • brian007

    Nothing happened on lollipop

  • Leslie Shaw

    Please help. I downloaded the fingerprint lock from the google play store and now i cannot unlock my phone. How do i bypass or disable this silly fingerprint? It wont allow me to access ANYTHING. help help help!

  • Leslie Shaw

    never mind i did a soft reset and it worked.

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