Tutorial
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1. Downlaod from Playstore

- Shizuku
- Pixel IMS

2. Enable dev mode (click the android version until it says enabled)

3. On Dev mode enable USB debug and WiFi debug

4. Open Shizuku

- Click pairing
- click dev option
- click wireless debug
- choose pair device with pairing code
- enter code at shizuku (top bar)
- go back to Shizuku
- click Start

5. Open Pixel IMS

- click on the telco (my case: celcom)
- Toggle to enable


Enable all these:

VoLTE
VoNR
VoWiFi
Enhance 4G
Allow adding APN
Show VoWiFi pref
Show vowifi pref in setting
add wifi calling to network name
show vowifi icon
show 4G for LTE data icon

6. Exit Pixel IMS
7. Exit Shizuku

8. Go to Sim setting and add APN

Name: ims
Apn: ims
Apn type: ims

9. save APN