ROG5 Motherboard Replaced are Optimized or Not?

[Shivam_G]

Please tell us some basic information before asking for help:
Model Name: ZS673KS
Firmware Version: LATEST
Rooted or not: NOT
Frequency of Occurrence:
APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
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My ROG5 Wifi & Hotspot died just after completing warranty period. I have submitted by phone in service center for repairing & they will change the motherboard to fix this issue. "After repairing there won't be any guarantee that this problem will not occur in future, also your device won't be performing well as its used to be", as per your service center.
My question here is that the Motherboard which they will be using is optimized one or it will be the same as old one "manufacturing defected"?
HERE I WANT TO ASK ASUS WHAT IS THE ACTUAL REASON FOR WIFI & HOTSPOT DYING FOR THOUSANDS OF USERS? IS IT THAT YOU ARE USING CHEAP COMPONENTS OR EXPLOITING USERS FOR MONEY?
Even after paying for repairing huge amount for servicing there won't be any guarantee on this device then what's the purpose for repairing it.

[Sriraman]

They told me the same, like u have 70 % chance of getting it repaired. Or else, I have to survive only with the mobile data. Is your wifi in working condition now?

[Jiaszzz_ASUS]

Hello, Sriraman .

May I ask if you have sent your device to an official ASUS repair center?

Could you send the serial number and RMA number for me to assist you further with verifying the repair information?

Thank you.

[ARP_ASUS]

Hi Shivam, 

If there are any issues post service or any issues related to the phone. Please let me know here. 

[Shivam_G]

Hello there, the same issue has arisen again within 10 days after repairing. 

Now what should I do? Is there any solution for this issue or I just have to keep on paying on this defective device?