I have successfully extracted some partitions from firmware using binwalk utility,
:~/Documents/ZTE$ binwalk -B flashdata.bin
DECIMAL HEXADECIMAL DESCRIPTION
--------------------------------------------------------------------------------
1310720 0x140000 JFFS2 filesystem, little endian
11882872 0xB55178 Copyright string: "Copyright (C) 2000-2013 Broadcom Corporation."
11884000 0xB555E0 HTML document header
11884135 0xB55667 HTML document footer
11889708 0xB56C2C PEM DSA private key
11971644 0xB6AC3C CRC32 polynomial table, little endian
11976636 0xB6BFBC HTML document header
11978141 0xB6C59D HTML document footer
11978156 0xB6C5AC HTML document header
11979582 0xB6CB3E HTML document footer
13799848 0xD291A8 Squashfs filesystem, little endian, version 4.0, compression:xz, size: 8269518 bytes, 1236 inodes, blocksize: 131072 bytes, created: 2016-06-09 05:09:52
52777336 0x3255178 Copyright string: "Copyright (C) 2000-2013 Broadcom Corporation."
52778464 0x32555E0 HTML document header
52778599 0x3255667 HTML document footer
52784172 0x3256C2C PEM DSA private key
52866108 0x326AC3C CRC32 polynomial table, little endian
52871100 0x326BFBC HTML document header
52872605 0x326C59D HTML document footer
52872620 0x326C5AC HTML document header
52874046 0x326CB3E HTML document footer
54694312 0x34291A8 Squashfs filesystem, little endian, version 4.0, compression:xz, size: 8269518 bytes, 1236 inodes, blocksize: 131072 bytes, created: 2016-06-09 05:09:52
Afterwards; I was able to extract what is seemed to be the root file system, it is XZ compressed file which can be decompressed by 7z utility
the output of 7z l extractedfs is detailed in this link
If some one interested to help in exploring and trying to port Openwrt to this router, feel free to send me a PM or reply to me here.
UPDATE:
I think source code of CFE and Linux Kernel development for H369A may be deduced / speculated from following repo.
It is true that the Repo is for Asus but the source code needs to be investigated further to see if modifications help in porting OpenWrt to this device
Work in progress ........