Need help inspecting custom router firmware

hello guys,

I have this router provided by my ISP Huawei HG630, it has a customer firmware which has so many options disabled, not only that but I am unable to disable remote management nor TR069 and basically the company is in control of my router.

so I searched online for a custom firmware for it and found some guys on one of the websites who has an unlocked firmware and its for free, checked the comments and everybody seems happy with it and they all say it works but that might fool the average joe but not me, I know router firmware can be bugged so now that I have the file downloaded, I am worried to update it on my router because then I would be compromised and I would unable to fix it and flash the original software cos my ISP don't provide it to the customers so I will have to buy a new router to fix that problem, not to mention that I will have bigger problems if my accounts are stolen.

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sorry for the long story above so in short can I post those files here in this thread for someone who is capable to inspect them to see if there is anything malicious or suspicious written within the codes of the firmware.

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thanks & god bless :)