In Volte call, what will happen if 3G becomes off-air and LTE coverage is poor, Will SRVCC happen? And also, will the call go to 2G or not?

4G LTE
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Hi Gents,

In Volte call, what will happen if 3G becomes off-air and LTE coverage is poor, Will SRVCC happen? And also, will the call go to 2G or not?

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