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.
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.
Certainly not, our unlocks are official and forever, you can update Android without any problem.
Unlocking method is for any SIM card of Optus, Vodafone from Australia and any other country.
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.
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.
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.
"Respuesta excelente liberé el celular"
"Always quick and efficient. The best. I will be back"
"Thanks for your fast and great service "
"Muy bueno y confiable y lo mejor rápido, es el mejor sitio para liberar ,desbloquear teléfonos móviles "