Unlock Samsung SM-J400M Galaxy J4

Unlocking to Australia, Optus, Vodafone

Samsung SM-J400M Galaxy J4
Select the network your phone is locked NOT the network you want to use
Why unlock my Samsung SM-J400M Galaxy J4?

Unlock Samsung SM-J400M Galaxy J4 for FREE

If you need to unlock a Samsung SM-J400M Galaxy J4 from home, you should call the network provider who has sold you the device, they can provide you the SIM network unlock PIN totally for FREE, but you must comply these requirements; you must be the original owner and have paid all pending bills. Our company is dedicated to calculate unlocking codes by IMEI, we work with official unlocking servers and we send the same code as the carrier.

Steps to insert SIM network unlock PIN

The easiest way to unlock a SM-J400M Galaxy J4 is to get the official unlock code thanks to our Samsung servers, when we introduce SIM cards from other carriers, the mobile phone prompts the SIM network unlock PIN, so you must order it on our website and you will receive perfectly explained unlock instructions in record time.

It should be noted that to unlock a Samsung device, sometimes, the unfreeze MCK code is required (if the attempts are exhausted, so the mobile phone will show - SIM network PIN blocked. Enter SIM network PUK - ) or could be necessary the regional code RGCK (if you are going to use the mobile in another continent or region), in our company we also provide these unlock codes.

Can it be relocked my Samsung SM-J400M Galaxy J4 when updating Android?

Certainly not, our unlocks are official and forever, you can update Android without any problem.

In which countries can I use my mobile phone?

Unlocking method is for any SIM card of Optus, Vodafone from Australia and any other country.

I cannot send calls with my Samsung SM-J400M Galaxy J4

If the SM-J400M Galaxy J4 accepts the SIM card but does not allow you to send or to receive any call, it could be because the IMEI is blacklisted due to loss, theft or unpaid bills. Even if SIM unlocking is achieved, it is necessary to fix the IMEI problem contacting the carrier.

How to unlock a Samsung SM-J400M Galaxy J4 if doesn't ask for unlock code?

The United States AT&T, Cricket, metroPCS and T-Mobile carriers can lock the SM-J400M Galaxy J4 and do not request the SIM network unlock PIN because they lock the devices through an application called Device Unlock, this app is already installed by default in the device. You have to buy the unlock and we take care of the approving authorization to unlock it. Once approved you only press the Permanent Unlock button and it will be unlocked forever.

Normally a Samsung from Sprint, Verizon, Tracfone, Boost Mobile, StraightTalk or Simple Mobile from United States does not request the network unlock code, these smartphones are blocked by the carrier customized firmware. We can remove the network restriction for these cells, but it must be unlocked through software and sometimes with remote help from one of our technicians.

These are the Samsung SM-J400M Galaxy J4 versions

How to insert the unlocking code for the Samsung SM-J400M Galaxy J4

1. - Turn on the handset on with a SIM card not accepted by the device (your new network operator)
2. - If the card has a PIN number, enter it and press OK.
3. - The device will prompt: “Network lock”, Now enter the code and press OK.
4. - Your phone will indicate: "The operation was successful", becoming permanently unlocked.

Unfreeze code: If the code in step 3 does not work, type the secondary code and press Unlock, the phone will indicate Unlock fail, now dial the code again from step 3.

Device Unlock app method:

1. - Make sure you have an active data connection via mobile data or Wi-Fi.
2.- From the Application list, tap Device Unlock, the application is pre installed in your device.
3.- Choose the Permanent Unlock.
4.- Restart the device.

Customer reviews
Unlock Samsung SM-J400M Galaxy J4 from any carrier by IMEI is rated 5.0 of 5 based on 73 Reviews.
Tomas - 21/06/2023

"El servicio ha sido de 10!"

J. Reyes - 29/03/2023

"Respuesta excelente liberé el celular"

Dino - 16/03/2023

"Great service."

Richard Moniz - 8/11/2022

"Always quick and efficient. The best. I will be back"

Lokito wally - 4/10/2022

"Thanks for your fast and great service "

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