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.
========================================
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.

[Shivam_G]

Yep, My device is working fine now. 

Service center leke jao & apne issue explain kardo, woh log apka phone le lenge & apko quotation bhejenge joh INR 54K ka hoga, aap unko mana kardena koi bhi payment karne liye. This issue is almost in everyone's ROG 5 model, so don't pay even 1rs. 

I will assist you further (if you need) but first of all, you just go to their service center & hand that mobile to them.

[Umarziaaaa]

What if they refuse to do so with out amount...my phone is out of warranty....guide me

[SMIT_GAMER]

mera to nhi kiya yaar ASUS walo ne 
maine fir  bahar se repair krva liya 12k mai 
mobile is fine now 

[Umarziaaaa]

Bhai unone apka bahar motherboard change Kiya ya repair....

[SMIT_GAMER]

repair 
reball + RAM change 

OR 

ek new issue bhi face kiya 
blueetooth IS not Turning 

may be blueetooth dead OR nikal liya OR Software Issue i think new update ke baad thik hona chahiye