[Samsung Galaxy J7 Questions & Answers] DiegoRiveraCampi:
(My first language is Spanish, I'm sorry if the translation is not perfect). ;)​

Device: Samsung Galaxy J7 (2016)

Model: SM-J7108

Firmware: J7108ZHU1APC3

TROUBLE:

I have a Samsung Galaxy J7 (2016) Duos, I thought it was SM-J7108, because in "Settings", the software version said "108", and behind the battery, it also said "108".

But when I was planning to update it to a new version of Android, I saw in the "Download Mode" that said model "SM-J7109", which caused me intrigue. I thought the device was actually "109" model, so I searched and downloaded the latest firmware of that model. And I proceeded to flash with Odin the firmware “J7109KEU1BRD1” of the "109" model. :confused:

When I turned on the device, I found the big problem that the device DIDN'T READ THE SIM CARDS of my country, it asked me for a SIM card from CHINA. Apparently the only firmwares for the "109" model were from China and there is no agreement with Google, so the device had NO GOOGLE APPs, nor Play Store. :crying:

I looked for solutions everywhere. And I never found a solution to return to the "108" model, it did not allow me to flash firmwares of the "108" model. I tried solutions for several days, until I succeeded in finding a new global firmware (J7109KEU1APC3) for the "109" model. I flashed it and fortunately it was perfect, without any of the above problems. :highfive:

SOLUTION:

Note:

· Make a backup of all your files because a factory restore will be done and everything will be deleted.

· Have “USB debugging” activated in the developer options. For this we go to "Settings - About the Device - Software Info" and repeatedly touch "Compilation Number" until the developer options are activated. We return to "Settings - Developer Options" and activate USB Debugging ”.

Required Files (download both on the pc):

· CROMService.apk

· Global New Firmware (J7109KEU1APC3)

Xda-Developers doesn't allow me to post links because I am a new user. You can find the apk and firmware easily if you google them. Otherwise, I can't think of any more solution that you write to my email "die.rivera_@hotmail.com" asking for the links with the title "Fix SM-J7109 Problems". (Only messages in english and spanish).

Steps:

1. Download the “CROMService.apk" and copy it to the device.

2. Install and open the app. A message will appear indicating an unlock.

3. Turn off the device.

4. Start “download mode” by pressing and holding the “Power, Volume Down and Home” buttons at the same time until a blue screen appears.

5. Press the “Volume up” button.

6. Open Odin on the PC.

8. Connect the device to the PC via USB cable.

9. In Odin it should appear colored blue in the “ID” box.

10. In Odin, click on “AP”, search and select the new global firmware (J7109KEU1APC3) that you downloaded on the pc. You need to select the ".tar" file. You have to extract the .rar file that you downloaded and you will get the .tar file. Then you select it in the "AP" box.

11. Go to the "Options" tab and make sure the "Re-Partition" box is empty. "Auto Reboot" and "F. Reset Time" are the only boxes that must be activated.

12. Go back to the "Log" tab and press "Start" and the new firmware will start flashing.

13. When finished, disconnect the cable. (The device will begin to loop without being able to turn on.)

14. Just remove the battery, and put it on again.

15. Start in "Recovery Mode" by pressing and holding the "Power, Volume Up and Home" buttons at the same time, until the samsung logo and text at the top comes out. Release and wait.

16. Using the “Volume Up and Volume Down” keys, move to and select “Wipe data / factory reset”, and then move and select “YES”.

17. Now move and select “Wipe cache partition”.

18. Now move and select “Reboot system now” and the device will turn on, without any SIM card problem and with all Google services and applications installed.

I hope it helps you and that you have been able to succeed by following the steps. Don't forget to click the "Thanks" button. :fingers-crossed:​

-Diego Rivera Campi-​