[Samsung Galaxy S7 Questions and Answers] vigilante:
Edited in 2022 to make it look a bit better!

15/07/2024. It's amazing how a Samsung Galaxy S7 Edge guide can still be relevant to this day! I updated the guide to make it even better language wise, and I removed some unnecessary steps. So now this guide only consists of 5 steps and a bonus step which is not necessary but definitely recommended.

*WARNING* *TAKE A NANDROID BACKUP OF EFS AND BASEBAND BEFORE STARTING*

Hello people, first I want to say that this is my first guide so it doesn't really look professional, but I am doing my best to be clear as possible.

In this guide, I will be showing you how to repair your IMEI for free/ without Z3X box

So let's get into it.

It is better to start fresh in stock ROM

So flash the stock ROM first

Now we are really starting,

Step 1) flash TWRP and flash Magisk (Can anyone confirm if rooting is necessary for this?)

Step 2) now go to mount and select EFS or else your EFS will be empty at the next step

Step 3) now go to file manager and go to /EFS

Just delete everything in it OR YOU CAN LEAVE Privo data and factory app, you have a backup anyway. *WARNING: DO NOT DELETE THE EFS PARTITION ITSELF, IT WILL MAKE YOUR PHONE NOT BOOTING ANYMORE ONLY DELETE THE FILES INSIDE OF IT, SO DELETE ALL FILES INSIDE THE PARTITION, NOT THE PARTITION ITSELF. DO IT THROUGH FILE MANAGER*

Step 4) now reboot your phone, first reboot may take 5-10/15 minutes please be patient and make sure you put your phone in the charger if your battery is low now when your phone is in the welcome screen look or your signal is returned if not just set up your phone sometimes it may take a while for the signal to appear. If your signal is returned then go to phone app and dial *#06# and look or the IMEI matches the IMEI of the box of your phone (make sure you have the original box if you don't have this then open the back of your phone (if you can), there is a sticker label with your s/n and IMEI. If you cannot open the back of your phone, then you will have to trust that the IMEI is right. If everything is functional, then you're done with this guide. The next steps are more ''checking" if everything is alright.

Step 5) If your s/n is okay then skip to step 8 if it is not correct then download a root explorer and go to /efs/factoryapp and edit the serial no file with a text editor and enter your s/n there now save it and then the IMEI and S/N should be correct.

Bonus step) IF the IMEI is correct and everything is fully functional, then delete the earlier made backup of EFS and baseband and make a new one with the working partition, then save it somewhere safe on an external drive, the cloud or on a USB, or just a pc that you will never reset or wipe its data.

Congratulations if you made it this far! I hope this guide has helped you, and that it has helped you. If not, then I'm sorry for not being able to assist you. This guide is just me sharing what I did to solve this issue. Good luck on solving your problem if this guide did not work.

If the IMEI is not correct or this guide doesn't work then I can't help you any further except for if you have any questions, however I found a guide for the Samsung Galaxy S7 (Edge) that might help. If you have an S8, then use the same link below.

Link: https://www.google.com/amp/s/xdafor...ow-to-fix-check-drk-imei-issues-t3379516/amp/

This is done on S7 Edge. May or may not work on other phones. Try it out at your own risk, but it should be safe as long as you back up everything before getting started.

******* Some tips for when you follow the above guide*******

1) When you flash combination firmware, and it gives you errors then dial *#1234# and look at the CP it should have UX in it (X could be 1,2 or 3 download the correct firmware with the correct bootloader version. You can upgrade from u1 to u2 and u2 to u3, but not downgrade from 3 to 2 or 2 to 1

2) If it didn't work then flash back to stock and fully delete everything in EFS folder then retry (this is actually just guide B) just follow the guide I wrote instead.

3) If you got bootloader exception error then keep tapping the home button fast until it reboots then just manually reboot and enter download mode

-----------------------------------------------------------------------------------------------------------------------------------

This guide was tested and worked on SAMSUNG GALAXY S7 EDGE SM-935F, it may work on other devices, but I cannot guarantee that it works on your device.

** I take no responsibility for any damaged device, make sure you take a backup so you can go back to the state before you started following this guide!**

If the device gets bricked then always flash back to stock, if you can't enter download mode then just wait until your battery drains and then when you put it in the charger it may start up automatically so enter download mode fast or if you got bootloader exception error then keep tapping the home button fast until it reboots then just manually reboot and enter download mode.

-----------------------------------------------------------------------------------------------------------------------------------

Happy flashing, and please confirm in the comments below if it worked for your device or not