Can't update firmware after 217

[Arthur22]

I want to tell the Asus company that you are unfair and spit on your fans. My phone cannot update the firmware after 217. Although I know that firmware 225 and 229 have already been released, they are not available on the website. I also want to know why Vo-LTE and Vo-wifi do not work on this phone? We paid money for your product, chose it from many other brands, and you spit on us. If this injustice continues, I will never buy ASUS again.

[Falcon_ASUS]

@Arthur22 
Please confirm if your phone's firmware is used across different regions.
If not, please refer to the following method to update the firmware.
Tap "Check Update" in "Settings" -> "System update" to check if the firmware is the latest version.
Note: During the update process, please charge your phone with the AC adaptor or make sure the phone has at least 15% battery power level.

However, if you are unable to update, it is advisable to visit a repair center for further verification.
The following is the contact information:
https://www.asus.com/support/service-center-location 
Also you can contact the local service center for help.
The following is the contact information:
https://www.asus.com/support/CallUs# 
Sorry for any inconvenience it may be caused.

[Arthur22]

Okay, I'll ask again. Why is the new firmware not on the website? When I check the firmware on my phone, it shows that firmware 217 is the latest.

Also you ignored my question about Vo-WiFi and Vo-LTE. When will this feature be available?

[Arthur22]

 If I use system update it show what 217 is last firmware version. This is true?

[DeMoNeN]

 

Vo-LTE works fine on this phone. It always did. Have you checked with your carrier?