Unlocking Sony Xperia Z4

For unlock Sony Xperia Z4 following options are available. If you don't know which option use for unlock your phone, please contact us. We will help you choose the right product for your phone.

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UNLOCK Sony Xperia Z4


What our customers say about unlocking

  • A simple, quick and reasonably priced service that does exactly what it says on the tin. Thoroughly reccomended.

    Andrew - 2017-10-20 06:04:39

  • Thanks

    Beatrice - 2017-04-18 20:17:44

  • Great work done, good having your services. Thanks

    Williams Kwarteng - 2017-04-18 20:07:48

  • Thanks a lot You just save me

    Daniele Sayuri - 2017-03-17 13:19:32

  • great service

    riki - 2016-12-16 05:50:33

Unlocking instruction for Sony Xperia Z4 ?

How to enter a network unlock code in a Sony Xperia Z4:

1. Turn on the phone with an unaccepted simcard inserted (simcard from a different network)
2. Phone should ask for network unlock code
3. Type NCK code in order to unlock the main network like T-Mobile, Orange etc.
Type SPCK code if the phone is locked in a subnetwork like Tesco.

How to check SONY Xperia Z4 code counter:

1. Turn on the phone whithout sim card
2. Type *#*#7378423#*#*
3. Select Service info
4. Select SimLock
5. Check where is X
6. If X is on NETWORK, SUBSET or PROVIDER and value is more than 0, you can unlock your phone.
7. If it is 0 unlock by code is NOT possible. The counter is blocked.

If the code counter shows all 0 it cannot be unlocked, because there are no tries left to unlock it.

Sony Xperia Z4 counter

Second way to check counter

1. Turn on the phone whithout sim card
2. Lock screen
3. Press sequence: Menu, Back, Back, Menu, Back, Menu, Menu, Back
4. Select Service info
5. Select SimLock
6. Check where is X
7. If X is on NETWORK and value is different than zero, you can unlock your phone.
8. If it is zero unlock by code is NOT available. The counter is blocked.

Network unlock code or Sim pin network code is a special type of code which removes the network blockade from your Sony Xperia Z4.
These messages will appear on the screen of your Sony Xperia Z4 when you insert an unaccepted simcard.
Sony Xperia Z4 has a limited amount of unlocking attempts. Usually all Sony Xperia Z4 have 5 tries. If your Sony Xperia Z4 has a blocked code counter, there are no tries left, you cannot unlock this device by code.
Important !!! Sony Xperia Z4 with a blocked code counter will still ask for a network unlock code.
Even if you enter the correct code it won't work with a blocked code counter.

The code counter can be reset only by an official Sony service.
Sony Xperia Z4 needs different types of unlock codes to remove the network blockade.
One of these codes is a NSCK code which is used in most Japanese networks like Docomo, Softbank etc.
Those networks cannot be unlocked with the standard NCK code.
Sony Xperia Z4 usually asks for this code as soon as you insert an unaccepted simcard ( from a different network ).


2017-11-18 12:30:56 TEITOKU

Very good.

2017-11-15 02:55:31 Z4 docomo

I could successfully unlock the SIM. Contact was also fast and I could trade with confidence. I would like to use the next opportunity very conveniently. Thank you.

2017-10-29 12:51:08 Atsushi

Thank you. I could sim unlock easily.

2017-10-28 12:52:00 Kaic

Good service

2017-10-22 12:57:09 Michał

Pierwsza liga. Byłem w szoku że tak szybko odblokowane sony xperia z 4 Tablet. Za 26.99 zł. Polecam wszystkim

2017-10-20 06:04:39 Andrew

A simple, quick and reasonably priced service that does exactly what it says on the tin. Thoroughly reccomended.

2017-10-04 16:41:07 Rupika

I was able to unlock Z4 SOV 31. Thank you very much.

2017-09-11 23:23:50 Agnieszka

szybko, konkretnie i co najważniejsze wszytsko działa. Szczerze polecam

2017-08-25 18:31:18 Beata

Wszystko śmiga

2017-08-24 09:06:17 Ramana

My phone is unlocked successfully. Very good customer service from Sim unlock

2017-07-18 02:05:28 Abd

Absolutely great service unlocked within 2 days and a great price

2017-06-25 14:41:04 Maciej

Odblokowanie się udało, kod otrzymałem w kilka minut. Polecam.

2017-06-20 15:29:25 Andrew

Thank you very much my phone is simfree now, just easy as ABC. Thanks to Sim-unlock.net, so fast.

2017-06-14 16:07:47 kawa_mike

Great service ????????

2017-05-05 15:49:00 T.M

Great. Very speedy. I recommend.

2017-04-19 10:00:18 r.m

good job

2017-04-18 20:17:44 Beatrice


2017-04-18 20:07:48 Williams Kwarteng

Great work done, good having your services. Thanks

2017-04-08 21:04:20 Paul

Quoted 3-4 days to provide code. Received it in 32 hours. Worked 1st attempt with clear instructions. Another company was unable to provide a code. Reommended.

2017-04-04 14:30:56 nyan

I could unlock my Sony Xperia Z4. Very good.

2017-03-17 13:19:32 Daniele Sayuri

Thanks a lot You just save me

2017-01-18 14:18:53 takao


2017-01-18 01:47:46 jtake

good job thanks

2017-01-09 14:44:15 Tomo

I received the item within 24 hours from order. I am very satisfied with the perfect service. The NSCK code I needed was certainly sent. Thank you

2017-01-06 01:37:01 shigeyoshi

Thank you for always providing quick service I could unlock this time as well.

2016-12-27 11:49:32 suke

good job

2016-12-16 05:50:33 riki

great service

2016-12-16 05:47:12 itil


2016-11-23 05:23:11 MAINUDDIN

its good, but too expensive....

2016-11-19 04:32:25 MAINUDDIN

it's done

2016-11-02 08:32:24 FM

Worked perfectly for my Docomo Z4 Tablet, thanks.

2016-10-25 15:37:48 Tomoyuki

I could unlock my phone surely by yor service. Very fast shipping made me happy. Thank you so much.

2016-10-24 13:58:14 Hiroshi


2016-10-20 10:05:30 Nori

Thank you.

2016-10-10 13:23:51 Pascal

Simple, easy peasy. Very happy will recommend to family and friends,deserves the 5 star.

2016-09-30 08:08:17 STC

thanks for quick job, and perfect operated

2016-09-12 17:20:52 John

Was a bit worried at first but all working brilliant service

2016-09-09 19:17:44 Kenneth

like 100% thanks

2016-08-30 13:49:33 Yuki

Thanks so much

2016-08-20 09:05:35 Kurt

Amazing service, the NCK and SPCK didnt work at first, so i contacted them with the problem and after minutes sim-unlock sent me the NSCK code that worked. I will definitely use their service again

2016-08-01 06:48:32 Daniel

At first the provided code are NCK and SPCK which doesn't work on my device, but as I mailed about the problem the staff reply rapidly with the working NSCK code. Really helpful and smoothy service. Thanks a lot.

2016-07-30 07:11:40 Jeff

Code arrived earlier than estimated time and it worked perfectly

2016-07-12 15:02:42 ?? ????

Au desbloqueio completo xperia z 4 Gifu eu recomendo esse site

2016-05-20 16:06:55 Harednra

It was nice experience with sim-unlock.net. Price is reasonable. The code issue time was exact as mentioned during order. The customer services is also quick. 5 Star sim unlock service. Recommended to all please use their service without any hesitation.

2016-04-12 02:10:11 Sohei

Thanks a lot

2016-03-30 14:08:35 Joao

Five Stars Service

2016-02-25 11:00:04 Yasuaki


2016-02-14 18:15:35 Łukasz

Od otrzymalem bardzo szybko. Polecam

2016-01-27 10:40:05 Adam

Cała transakcja zajęła 10 min (od kliknięcia kupuję, przez zapłatę, do otrzymania kodu). Zatem gorąco polecam

2016-01-08 15:40:22 HIDEKI

I was able to unlock Thank you