[Q] Use Google Voice as Voicemail (AT&T) topic

For other phones, I was able to use Google Voice by following the instruction at GV settings:
**004*1xxxxxxxxxx#

But it seems voice mail still goes to AT&T default voice mail.

I also tried *#61#, and it says calls will be forwarded to my GV number. Still same result

In the phone settings, I changed Voicemail setting to GV number, still same results

I'm wondering if this could be an issue with Huawei software. Do you have same issue?