Airtel VoLTE issue in Asus Zenfone Max pro M1

[jay_mech24]

I ported from Vodafone to Airtel, now in my airtel sim volte enable option is not available.
but when I inserted another airtel sim into my mobile then volte working properly.
And my same airtel sim card insert into another phone then also volte working properly.
I reset my phone totally (lost total data), than VoLTE is working fine, but i lost sim and than get a new Airtel sim than again VoLTE is not coming.
I tried with *#*#4636#*#* but there is no VoLTE enabled option.
Build number 2007.084
My phone is Asus max pro m1.

[victor010]

Hi there, request you to update your device to the latest firmware version and get back to us if the issue persists. Thank you.

[rahulpatil200]

I am facing the exact same issue on the same phone ASUS Max Pro M1 even after updating the device to latest firmware.

[ZT-5610cb21]

rahulpatil200

I am facing the exact same issue on the same phone ASUS Max Pro M1 even after updating the device to latest firmware.

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I am having the similar issue with Airtel Sim on my Asus rog phone zs600kl.

[vmallick40]

I'm facing very bad network connection on Airtel volte. Slow net , call drop