[Not Resolved] GT-i9500 (S4 copy) – EFS corrupted

Hello.

Today, I write here to get some help.

After several days research everywhere on the web without find anything or some partial informations… I really need your help.
I have some skills but I’m not really a pro

First, I bought this phone from this wholesaler : http://www.ahappydeal.com/product-142733.html

It seems it is a copy of Samsung Galaxy S4. I knew it.
This smartphone worked perfectly until I make changes of recovery.

I rooted my phone with this tuto : https://droidchina.com/forum/showthread.php?tid=607
It works perfectly.

I tried to flash the base recovery with a custom recovery (here : CWM).
I have failed…

[Root] Recovery Tools – Flasher is the last app I used to flash my recovery.
Playstore link : https://play.google.com/store/apps/details?id=de.mkrtchyan.recoverytools

When I rebooted the phone into recovery mode, the phone booted normally… BUT..
Now :
– I can’t use the recovery mode
– my SIM is no more accessible.
– my IMEI is invalid.

– the baseband version is Unknow

In my researches, I found one interesting thing…
It would seem I have corrupted my EFS directory.

Here are device infos obtained with Mobileuncle Tools

I can use ADB and FASTBOOT commands with Androïd SDK.

I’m really allergic with the toolkits…
Odin, SP Flash Tool don’t work. Why ? I don’t know.

I tried to use EFS Professional to repair Unknow Baseband / No Signal but this soft don’t work with my phone (no Qualcomm processor)

I prefer use adb / fastboot commands or some scripts.

my requests are the followings :

– Anyone could give me Stock ROM and Custom ROM ? (I think I need Recovery, Boot, Cache and System ROM)
– Anyone could give me an original EFS directory zipped and not corrupted for this phone ? (I could try with basic EFS directory).

If you need more informations (screenshots) then you can ask me .

I’m waiting for your replies. Many Thanks.