Wiko U FEEL (wiko-ufeel)
Users owning this device
UnDevDeCatOS: Screen is broken
Wiko U Feel has two different board revisions: one using the Tinno p6601 board (like BLU R1 HD, Lanix Ilium L910, QMobile Noir A6, Evertek EverSolo, Smart Art P6601) and the other using the p6609 board. It appears that the current packaged kernel is compatible between these two boards.
As described in the WiFi troubleshooting guide, you need a firmware loader, named 6620_launcher, but it panics the kernel. If you want to debug wifi, then check out the mediatek section on the WiFi page.
Sound card is detected in alsamixer, but dosen't work
I couldn't find the official dtsi source code, so i decompiled the dtb blob from the stock rom with dtc command line tool. Unfortunately with this method we don't have the comments.
How to enter flash mode
Fastboot is broken. It gives Unknown Chunk type, but it is possible to install pmOS with TWRP. Refer to Android_Recovery_Zip_Installation for installing.
Flashing with proprietary program SP Flash Tool also work fine. Tested with flashed emmc boot partition and system partition stored on external sdcard.