Please tell us some basic information before asking for help:
Model Name:MAX PRO M1
Firmware Version: ANDROID 9 &10 BETA 1,2
Rooted or not: ÑO
Frequency of Occurrence: ALWAYS
APP Name & APP Version (If your issue relates to the app): CALL WAITING Service only on BSNL.
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.
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My BSNL 4G SIM not working call waiting service in ASUS ZENFONE MAX PRO M1.
HOW TO FIX THIS ISSUES.
