Calling+internet same time

[dharm4ug]

Why I can't call +internet use same time.

[Y_ASUS]

Hi dharm4ug,
If you wish to use internet (4G) and call at the same time, your carrier must support VoLTE, and your carrier's VoLTE must be supported with ZB601KL. Please note that VoLTE compatibility will vary by country and carrier on ZB601KL. If you don't have VoLTE, the internet will switch to 3G when you call.