Try to upgrade firmware but not detected

[dr_nasseer]

This is my device description:
Model Name: ASUS X00LD
Firmware Version: WW. 14.0400.1708.160-20170911
Rooted or not: no
I tried to upgrade firmware using version WW-15.0400.1910.528 as provided on the web. I was downloaded it then copied to internal phone, but there is no reaction on system update detection such as icon notification on the drawer, even I restarted several times.
What should I have to do? I want to upgrade Bluetooth version instead. And also to follow the android development until the latest firmware.
Need solution...
Please help me.
Thanks

[Christine_ASUS]

Hi dr.nasseer
1. Kindly change another USB cable, or check if the cable can work with other phone or not.
2. Have you tried to install those apks?

[leehueesu]

Which rom i need download to upgrade my phone mod?

[Christine_ASUS]

Hi leehueesu
Thank you for your asking. Kindly provide the information below so that we can better assist you.
1. Model Name: Settings>System>About phone>Model
Refer to the link below to check the model name by model no. in the link
https://www.asus.com/support/FAQ/1014441/ 
2. Where did you get this firmware version?
3. Have you ever unlocked or rooted your device?

[leehueesu]

Thanks for answers! I buy it from a buyer on Lazada. I check it unroot . It still stuck on 7.1.1 ver...i cant upgrade to 8.1

[dr_nasseer]

Christine_ASUS

Hi dr.nasseer

1. Kindly change another USB cable, or check if the cable can work with other phone or not.

2. Have you tried to install those apks?

View post

1. I changed another USB, but nothing happen. Still not working.
2. Yes I tried them all, but still no USB is detected and USB diagnostic test is failed.
Can you help me?