[Xperia Z3 Original Android Development] NicoTiza:
Hi all! Thanks for your quickly help! I will explain all what i did.

Yes. I was tryn everything, until i think, why not go back to Stock ROM, and start again. TWRP 3.3 dind't flash as well. So i continue installing LOS15, but some problems occurs. Will explain next.

Yes bro, thanks for your answer. I do it, but nothing. But i see i was using .570 (may be is that, will try with .291) Wich one do you recommend me?

So... i will explain what i did. I even can't install TWRP 3.3 and now i lost recovery.

What do i did?

1) I was on CR6, with TWRP 3.1.1 (everything was ok here)

2) CR6 tells me a new version: CR 8 PAX. So i decide to install it from internal option (OTA?)

3) It goes to recovery (actually TWRP 3.1.1), but fails when it cheks devices model. Error saids: "This is for Z3, your device is Leo" (so? isn't it the same) So i remember, right i need new Recovery (never understood why, but i imagine that there is a kind o file o config needed). Ok... lets flash TWRP 3.3.1....

4) Donwload new TWRP version, donwloaded from where i can, couse allways is a kaos to find an official link.

5) Flash it from Fastboot command. Tryin' FOTAKernel (if i wrote another thing it's bring me an error saying that could't find that partition i think) So, i wrote FOTAKernel like this. Doen't Works, but it said that flash finished correctly. So try with Recovery only (Fastboot flash recovery recovery.img) but nothing too.

6) Reading various posts, someone says: You have 2 recoverys installed now, couse new one installs in FOTAKernel, and old one in Recovery. He/she said: Hold Down Vol Button + Power button, until you see LED Screen indicator. Then i will bring you up to TWRP 3.3.1... but nothing. So tryied old way, and sometimes i could enter old Recovery 3.1.1 and sometimes it only loops.

7) I think... ok, there is a problem with FOTA or something. Think on ROOT, think on flash it form TWRP... Ok go for there..

8) Chek Root Acces: IS OK! ----- Installing again with Fastboot: NOTHING.

9) Installing from TWRP 3.1.1 ----- NOTHING.

10) Trying installing step by step: From TWRP 3.1.1 try to install TWRP 3.2 ---- SUCCESSFULL!

11) Now i'm in TWRP 3.2: so i said, ok now i will be able to install fkng 3.3 ver. ------- Installed SUCCESSFULLY!

12) Boot loop. Sometimes Internal Storage was deleted, so i even re enter to previous OS installed (like LOS 15, CR6...)

13) So now, i even have an OS. And lost Recovery couse sometimes it erase my previus TWRP.

So... i decide to go STOCK. 14) Installed Stock Rom Pre Rooted (D6653_23.5.A.0.570_Customized+AU-SuperSU-v2.68+-TWRPrecovery3.0.2-0+-signed)

15) Only TWRP that i could flash is TWRP-3.1.1-3.img

16) install TWRP 3.2.1-2 from Recovery. Now i get TWRP 3.2.1-2 installed correctly

17) Try to install TWRP 3.3.1 ---> Install Successfully ----> Reboot into Recovery, Black Screen after Logo Boot, Reboot (loop). So i can't enter this Recovery. Tryin even Holding buttons...

So... i can't do nothing with this recovery, i can't install it. Sometimes it get installed but black screen, no recovery, bootloop.

I will try .291 couse i was trying .570 pre rooted. I hope is this...

Thanks to all, sorry my english. Thanks!!