Selecline Smartphone 5 (auchan-s6s5in3g)

Also known as Maysun M5016
have in mind that it's hard to find info about this phone (also it looks like this is not the only Selecline Smartphone 5, maybe I should use M5016 codename as official(ish) name?
Official name is Selecline Smartphone 5" but I omit the " symbol which creates more trouble than I thought in scripts
== Contributors ==
* Halamix2
== Maintainer(s) ==
* Halamix2
== What works ==
* Nothing
== What does not work ==
* Everything, no kernel sources available
== How to enter flash mode ==
Probably unlocked bootloader by default, needs proper images
Probably AOSP recovery or similar
Reflashed with TWRP, unfortunately I don't have copy of original bootloader
Key combination:
* Press and hold power,
* Quickly press and hold VOL-,
* Release both buttons as soon as boot logo shows on screen
* You're in recovery mode now, navigate to "bootloader" (VOL+/-) and press power to enter fastboot mode.
`
== Installation ==
Not there yet.
== Hardware ==
=== Motherboard ===
Front of the motherboard
Test points: NBOOT, DM & DP (USB data -/+), 
VBAT, VCHG, GND (battery voltage, USB power),
INT & VDD & GND & SCL & SDA & RST (I2C)
Back of the motherboard
RF shield is soldered in place, under sticker is SoC and WI-FI/BT chip
=== Specs ===
link to even more data about the phone
CPU: ARM Cortex-A7 4x1.3GHz
armv7l
GPU: Mali-400 MP (openglES 2.0)
Fingerprint SELECLINE/S6S5IN3G/S6S5IN3G:6.0/MRA58K/W17.07.3-15:USER/RELEASE-KEYS
id MRA58K
AIDA64 reports:
hardware sp7731g_fs066_32v4
platform sc8830
Two cams, front 0.3mpx and back 2mpx
Sensors:
MC3XXX 3-axis Accelerometer
CTP Light sensor(Noexist) (doesn't show anything)
CTP Proximity sensor (probably just uses front camera, I didn't see anything soldered in place for the sensors)
=== Partitions (WIP) ===
$ cat /proc/partitions 
major minor #blocks name
 253 0 409600 zram0
 179 0 7570432 mmcblk0
 179 1 5120 mmcblk0p1
 179 2 1024 mmcblk0p2
 179 3 15360 mmcblk0p3
 179 4 2048 mmcblk0p4
 179 5 1024 mmcblk0p5
 179 6 1024 mmcblk0p6
 179 7 1024 mmcblk0p7
 179 8 1024 mmcblk0p8
 179 9 1024 mmcblk0p9
 179 10 1024 mmcblk0p10
 179 11 1024 mmcblk0p11
 179 12 1024 mmcblk0p12
 179 13 1024 mmcblk0p13
 179 14 1024 mmcblk0p14
 179 15 1024 mmcblk0p15
 179 16 15360 mmcblk0p16
 179 17 2355200 mmcblk0p17
 179 18 3072 mmcblk0p18
 179 19 6144 mmcblk0p19
 179 20 153600 mmcblk0p20
 179 21 16384 mmcblk0p21
 179 22 1024 mmcblk0p22
 179 23 1024 mmcblk0p23
 179 24 1024 mmcblk0p24
 179 25 1024 mmcblk0p25
 179 26 4980719 mmcblk0p26
 179 96 4096 mmcblk0rpmb
 179 64 4096 mmcblk0boot1
 179 32 4096 mmcblk0boot0
$ df
Filesystem Size Used Free Blksize
/dev 223.8M 72.0K 223.7M 4096
/sys/fs/cgroup 223.8M 12.0K 223.8M 4096
/mnt 223.8M 0.0K 223.8M 4096
/system 2.1G 1.5G 672.7M 4096
/data 4.6G 2.6G 2.0G 4096
/cache 143.6M 320.0K 143.3M 4096
/productinfo 928.0K 88.0K 840.0K 4096
/sale 928.0K 172.0K 756.0K 4096
/storage 223.8M 0.0K 223.8M 4096
/sys/fs/cgroup/blkio: Permission denied
/mnt/runtime/default/emulated: Permission denied
/storage/emulated 4.6G 2.6G 2.0G 4096
/mnt/runtime/read/emulated: Permission denied
/mnt/runtime/write/emulated: Permission denied
$ cat /proc/mounts 
rootfs / rootfs ro,seclabel 0 0
tmpfs /dev tmpfs rw,seclabel,nosuid,relatime,mode=755 0 0
devpts /dev/pts devpts rw,seclabel,relatime,mode=600 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,seclabel,relatime 0 0
selinuxfs /sys/fs/selinux selinuxfs rw,relatime 0 0
debugfs /sys/kernel/debug debugfs rw,relatime 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
none /sys/fs/cgroup tmpfs rw,seclabel,relatime,mode=750,gid=1000 0 0
tmpfs /mnt tmpfs rw,seclabel,relatime,mode=755,gid=1000 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
/dev/block/platform/sdio_emmc/by-name/system /system ext4 ro,seclabel,relatime,data=ordered 0 0
/dev/block/platform/sdio_emmc/by-name/userdata /data ext4 rw,seclabel,nosuid,nodev,noatime,noauto_da_alloc,data=ordered 0 0
/dev/block/platform/sdio_emmc/by-name/cache /cache ext4 rw,seclabel,nosuid,nodev,noatime,noauto_da_alloc,data=ordered 0 0
/dev/block/platform/sdio_emmc/by-name/prodnv /productinfo ext4 rw,seclabel,nosuid,nodev,noatime,noauto_da_alloc,data=ordered 0 0
/dev/block/platform/sdio_emmc/by-name/sysinfo /sale ext4 rw,seclabel,relatime,data=ordered 0 0
adb /dev/usb-ffs/adb functionfs rw,relatime 0 0
tmpfs /storage tmpfs rw,seclabel,relatime,mode=755,gid=1000 0 0
none /sys/fs/cgroup/blkio cgroup rw,relatime,blkio 0 0
/dev/fuse /mnt/runtime/default/emulated fuse rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/fuse /storage/emulated fuse rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/fuse /mnt/runtime/read/emulated fuse rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
/dev/fuse /mnt/runtime/write/emulated fuse rw,nosuid,nodev,noexec,noatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
== Original software ==
Android 6.0 with 3.10.65 kernel, might be the most stock system I've ever saw
I've managed to flash TWRP from different phone on it, so only adb. Unfortunately that made Android to be stuck on boot logo. Adb works fine in Android and recovery, whereas in recovery the shell runs on root priviledges
== See also ==