What do you need for remote unlock:
1. A Windows computer (pc or laptop) with an internet connection. For some unlock operation internet speed (download & upload) might be important, so you may run a test here and give us result before we start >>Speed Test<<
2. USB cable for your model, make sure is genuine and fully working, connect it to a main USB port to your computer
How to unlock network Samsung Galaxy J4 J400F Android 8.0:
Unlock remote online by cable is a quick solution, it requires internet connection and some computer knowledge to install and use. Contact us before starting this procedure:
1. Install necessary software on your PC following tutorial from HERE , you will be asked to run a small USB remote program on your windows PC and a VPN software so our tech can unlock your phone.
2. Power on phone without sim, open dial and tap *#0808# and select “DM+Modem+ADB” and press OK. Connect phone to usb cable and share “Samsung Android” in usb redirector list.
After payment is received we will perform required operation
Video example: How To Unlock Network Samsung Galaxy J4