Can't switch Data connection on receiving calls

[abhigoyal]

I'm using Galaxy M31

One issue related to VoLTE calls i faced is, when i receive call on my Sim 2 my data connection goes off (as my primary sim in sim 1 Jio with default Mobile Data as Sim 1) but i have enabled it to switch to caller SIM when receiving calls on Sim 2

Why is it not switching? 

[abhigoyal]

Any Method available to enable automatic data switch while on call at Sim 2?

[Ayan_Chakraborty]

Phone needs more than one antenna to maintain both call and mobile data in different sim cards. M31 has only one.

[Anonymous]

No

Exynos 9610,9611 Only support Dual Volte Not Dual 4G (standby*)

[abhigoyal]

i'm not asking for dual 4g either. just that when call comes on sim 2, the data from sim 1 should switch to sim 2.

[abhigoyal]

and neither it lets to manually change data setting during an incoming call to sim 2. is there any way to fix this?

[Ayan_Chakraborty]

this needs 2 physical antennas which m31 does not have. No software can fix this

[abhigoyal]

i'm not aksing for dual 4g and dual VoLTE but it should should switch data connection for appropriate call SIM or for it also 2 antennas are needed

[Ayan_Chakraborty]

Just use 2 phones. What u are asking has been an issue since time immemorial but phone manufacturers never seem to care

[Ayan_Chakraborty]

Even the s20 with 7 antennas don't have this feature😅