Unsupported device that already installed openwrt

Hi guys
Can anyone guide me?
I recently bought a router that has openwrt installed by default and I have access to the luci web version.
It is most likely a customized version.
Is there a way to update my device with one of the versions of Sysupgrade image using Flash new firmware image?
Or any other way so that I can install the raw version of openwrt?
I executed the ubus call system board command and it shows the following output:

root@OpenWrt:~# ubus call system board
"kernel": "4.14.195",
"hostname": "OpenWrt",
"system": "MediaTek MT7621 ver:1 eco:3",
"model": "HIR204",
"board_name": "mediatek,HIR204",
"release": {
"distribution": "OpenWrt",
"version": "18.06-SNAPSHOT",
"revision": "2.08",
"target": "ramips/mt7621",
"description": ""

It is the kind vendor fork that kept openwrt branding. You can try porting OpenWRT to it.
16MB flash 64MB RAM?

It is very minimal spec, but you can do more exploration.
Most important would be to determine if mobile modem has opensource support. Like lsusb/lspci/dmesg etc.

i don't know :sweat_smile:
but here is my memory and storage info


Here the answer would be no.
You cannot use a sysupgrade image from another device to flash your router.

Check https://openwrt.org/docs/guide-developer/adding_new_device and see if you are up for the adventure :slight_smile:

I correctly identified the box, as said, if you are up for the task. Obviously if it is unsupported modem type not worth the candles to make a potato out of apples.

I updated to 23 and it was destroyed

[Moderator edit: added English translation. Please post in English; you may also post with your preferred language.]

من اپدیت زدم به ۲۳ نابودشد

You need to ask for recovery process where you got your OpenWRT fork from.
If boot process is similar you can try:

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