Unlocking Samsung SGH i537

For unlock Samsung SGH i537 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 Samsung SGH i537


What our customers say about unlocking

  • Fast delivery, works great

    Kamil - 2021-09-23 08:05:43

  • Just flipping amazing, I was totally skeptical. 5-stars and Great job to you all, made my day. THX a BUNCH :)

    josh - 2018-07-14 19:14:39

  • Worked fine.

    Loren - 2016-06-20 18:08:06

  • I got my code for my Samsung easy simple and a must use if you are looking for a code. Will continue to use. Great Website

    Denzel - 2016-05-04 17:14:30

  • Codes came a day early and worked like a charm. Fantastic service, quality support, can't really ask for much more. Will be returning in the future if I need to unlock another phone.

    Kelly - 2016-04-04 22:50:13

Unlocking instruction for Samsung SGH i537 ?

How to enter a network unlock code in a Samsung SGH i537

Entering the unlock code in a Samsung SGH i537 is very simple.
1. Start the Samsung SGH i537 with an unaccepted simcard (unaccepted means different than the one in which the device works)
2. Special unock window should appear
- For message Sim network unlock pin you should enter the codes if the following order, Unfreeze confirm, NCK confirm (please try a couple of times if the SGH i537 does not accept it for the first time)
There is also a special RGCK (regional lock code) code sometimes provided. Please use the RGCK code the same way as the NCK code.
- If Service provider pin appears enter the codes in this order
Unfreeze confirm, SPCK confirm (try a couple of times)
3. Samsung SGH i537 is now network unlocked !!!

* sometimes the unfreeze code is not provided by the network (check the description of chosen service)

In order to unlock Samsung SGH i537 network blockade, you need a NCK (network) code. If the code counter is blocked, you will need MCK (unfreeze) code as well to reset the code counter.
If Samsung SGH i537 has a blockade for a subnetwork like Tesco or Virgin you need to use a SPCK (service provider) code.
Most devices bought on a contract from a network provider are network blocked.
It means that the Samsung SGH i537 can only receive signal from one network. If you insert a simcard from a different network, the device will ask for an unlock code, or will show the message that this simcard doesn't work.
Networks that can be unlocked include: AT&T USA, Orange, EE and many more.
If you want to remove a network blokade from Samsung SGH i537, please use this link:
Samsung network unlock.
If a message ( sim network unlock pin ) appears on the LCD of your Samsung SGH i537, it means that the device is blocked. You cannot use any other network, until you enter the correct unlock code. Every network has a different price and unlocking time, but all of them can be unlocked. Use the link below to check your device Unlock networks for Samsung SGH i537
Phone freeze is a result of the incorrect code being inputted too many times, which means your Samsung SGH i537 is Hardlocked. You will require a Defreeze (MCK) code and a NCK code to unlock your phone.
There are different types of unlock codes for your Samsung SGH i537. One of them is called unfreeze code, which is used to reset the code counter in your device. Samsung SGH i537 usually have 3 TRIES to enter the unlock code. The biggest problem is that the phone doesn't show the code counter and there is no way to check. If you want to unlock a Samsung SGH i537 with a blocked code counter, you need the unfreeze code. The code can also be used to remove a regional blokade if you want to travel to different countries.


2021-09-23 08:05:43 Kamil

Fast delivery, works great

2018-07-14 19:14:39 josh

Just flipping amazing, I was totally skeptical. 5-stars and Great job to you all, made my day. THX a BUNCH :)

2016-06-20 18:08:06 Loren

Worked fine.

2016-05-04 17:14:30 Denzel

I got my code for my Samsung easy simple and a must use if you are looking for a code. Will continue to use. Great Website

2016-04-04 22:50:13 Kelly

Codes came a day early and worked like a charm. Fantastic service, quality support, can't really ask for much more. Will be returning in the future if I need to unlock another phone.

2015-07-03 02:18:47 Darren


2015-06-02 21:38:46 Gidgiddoni

Funcionˇ perfecto y a la primera, gracias por su ayuda

2015-03-20 07:08:36 Casey

Site did everything as advertised. Very reasonable price compared to some other places i checked and sim-unlock did it in half the time they said it would take. A+

2015-03-06 18:49:14 Cisco

It actually worked as advertised I am very happy with how quickly and easily this worked. My code was provided to me in the amount of time that was determined. VERY VERY HAPPY. Thanks.

2014-10-03 14:20:56 Harris

I need help

2014-07-12 12:00:09 Wojciech

Wszystko bardzo dobrze :) moj telefon samsung s4 active zostal odblokowany dziekuje i polecam

2014-04-08 16:36:15 GR13

Amazing, fast (less than 24 hours) , simple, worked like a charm.... thank you for the simple unlock... worth the cost

2014-03-18 13:36:47 Darren D

Received unlock code, typed it in and like magic, my AT&T Samsung Galaxy S4 Active is now a member of the T-Mobile Family. Thanks so much Took a couple of days longer than I thought, but I submitted my order on a Thursday. Even cell phone wizards deserve a weekend off of work Thanks again

2014-01-05 21:28:44 ziggyz

Simply amazing. 16hrs and voila... ordered on Saturday night, order fulfilled Sunday afternoon. My Samsung Galaxy S4 Active - SGH i537 is now unlocked and fully functional. Now i just need to find a way to remove that annoying ATT flash screen on startup. Thank you so much - it was money well spent. I highly recommend this service, my beloved S4 Active is back.

2013-12-19 15:20:40 Massimo


2013-12-01 20:23:15 Daniel

Received unlock code in under 12h, and it worked perfectly. Effortless process. Thanks

2013-11-13 17:28:21 phillip

Flawless Ordered before I went to bed. Code was in my inbox next morning . Phone was on new network by noon. Thanks. Tried another site for $5 first. took them 3 days and they couldnt find code .

2013-10-01 14:44:03 Mitchell

Great service, I received my code quickly and it worked perfectly. For only €5 (£4.36) it is a bargain

2013-09-30 17:49:44 travelexpert

I was told by other services that unlocking my AT&T Galaxy s4 Active was not possible. These guys at sim-unlock got it unlocked in less than an hour, and made me very happy Thanks for great service guys

2013-09-29 20:32:22 Freddy

It was very useful thank you very much

2013-09-22 20:11:12 Ricky

Was very satisfied with the service received from sim-unlock. I had to wait a while but the code worked and it was cheap. Thanks.

2013-09-16 13:57:08 Mike

Code received in ten minutes. Thanks Samsung s4 active at&t.

2013-09-11 08:21:37 R

Received code within a few hours, worked perfectly, very reasonable price.

2013-09-07 19:39:42 soulcrack

lo unico que puedo decir de este servicio es que es genial,extre,inexplicable muchas gracias y desde hoy sere su cliente numero uno

2013-09-04 11:31:14 Joseph

very fast & perfact

2013-08-30 19:30:00 Jose


2013-08-30 14:03:37 Ludwing


2013-08-20 16:31:24 Francisco

Great Service Very fast and affordable. Highly recommended

2013-08-19 21:10:32 Nicoexel

Excellent work 100%

2013-08-16 17:05:21 David

Very very Impressed estimated wait time was almost 2 days. received my code in 1 hour and 40 mins and it WORKED Very cheap also other sites quoted me $24 USD for a 6 hour turn around. will be doing a lot more business here now. A++++++++++++

2013-08-13 17:39:53 Maria

My code was ready in about 3 hours and it worked perfectly. Samsung Galaxy S4 Active At&t

2013-08-11 19:25:39 Miroslav Volech

Fast delivery. I had code for my samsung galaxy s4 active in six hours. And it works fine

2013-08-10 01:23:47 LukeCash

This worked perfect. Best price you can find on the Internet for the S4 Active.

2013-08-01 23:58:03 bruno

realmente sorprendentemente rßpido y eficaz (Y)

2013-07-31 16:47:05 rossell diaz

it work tank you

2013-07-26 21:18:44 D

Everything is excellent but 2 things: More Accurate timing. maybe 4 euro, Cause 5 is a little bit to much.

2013-07-26 20:11:31 JUNNO


2013-07-26 05:54:39 Andres

Just unlocked my Galaxy S4 Active and sim-unlock provided me with the code in the time advertised and it was so much more cheaper than the other websites available, I couldn't be happier with the service.

2013-07-25 18:23:15 NAIF ALTURKI

Perfection I received the code in less than 24hrs and took me 15 seconds to get my galaxy s 4 active unlocked. Thanks a lot

2013-07-24 16:40:51 paulyg

code came in less then 24hrs and worked first try. thanks

2013-07-21 14:14:20 Chaz

Excellent This was the only unlocking site I found that listed my Galaxy S4 Active. They cost was minimal and the time to deliver the code was less than 24hrs. I couldn't ask for more. Sim-unlock.net easily earns 5 stars.

2013-07-17 17:03:17 Christian

Perfect service. And the price is great

2013-07-17 16:05:13 Rafael Silveira

After +/- 40 hours I received the code and it works flawlessly at first attempt. It works with my SAMSUNG S4 Active from AT&T (SGH-i537). Thanks for great service

2013-07-17 02:29:39 Han

This took a little longer that i would expect it. Three days... BUT it was a newly released model. Great Pricing BEST So Five Stars it is. Thanks guys

2013-07-12 15:19:15 El Guapo

Excellent service, worked great.

2013-07-11 02:24:35 Quan

Unlock code worked great, thanks. Cheapest I could find anywhere for the Active.

2013-07-09 18:39:58 Jian

Service was really fast. Thank you.