Elephone U pro is the latest flagship for Elephone until now, it has 5.99 inch 2160 x 1080 pixels Corning Gorilla Glass Screen 5 display, powered by Snapdragon 660 Octa core processor, RAM 4GB/6GB ROM 64GB/128GB internal storage, coming with 8.0MP front camera and 13.0MP + 13.0MP dual rear cameras, running Android 8.0 OS. It has a fantastic design as you can see. Right now it starts to sell on Gearbest for 4GB 64GB at $389 and 6GB 128GB at $429.99. Besides, right now you can enjoy its ROM first.
After many hours of coding. Took System dump and coding rawprogramm_unsparse and patch0.xml file.
I was able to successful Build the current Base as Stock Rom 20180227.
This is the first Stock Rom, faster then official release of Elephone.
i took out all dumps with “dd” all are images . thats why the zip file is a bit bigger .
you need:
1. QPST flashtools (qualcomm)
2. Qualcomm Drivers for the Device
3. a firehose file for SDM660
4. rawprogram_unsparse and patch0.xml
5. python-2.7.13.amd64
6. python 3.0
7.ADB (newest ADB files are in the zip) . copy the “adb” folder to C:/
i uploaded all here:
Stock 20180227 Build. : https://androidfilehost.com/?fid=890129502657596504
Tool files: https://mega.nz/#!PpAXWbjZ!ny4XYI__u…lPRDcPi03FKStk
How To:
extract the downloaded zip files
1. install QPST/QFIL Flashtools
2. install both Python files
3. Install drivers ( qualcom drivers. make sure that they dont interrupt with other device drivers you have .)
you have to reboot your device into edl mode by
C:\>cd adb adb shell reboot edl
phone will reboot to edl mode ( black screen, no led)
Now check your device manager . the COM & LTP port should show “Qualcomm HS-USB QDLoader 9008”
if not then update the driver and choose it from your internal list. or google for it 
if the driver is fine, open the QPST/QFIL FLashtool in
C:\Program Files (x86)\Qualcomm\QPST\bin\QFIL.exe
prepare the Flashtool:
in Select Build Type:
choose: Flat Build
in Select Programmer:
browse and choose the “prog_emmc_ufs_firehose_Sdm660_ddr.elf” file
( you cant see it change to “all files” )
Load XML:
now choose the rawprogram_unsparse.xml and right after the patch0.xml
you can press the “download button”
wait a bit , at the end of the flashing procedure it will make an error, thats normal because i left the patch0.xml empty.
after all disconnect the cable and hold Power button a few seconds. phone will reboot .
the build is without userdata that means it will be Stock and like a factory reset.
Source: XDA