Wifi-calling problems

Hello,(*1*)I’ve Galaxy A51 telephone with newest Samsung updates.(*1*)I’ve enabled wifi-calling and VoLTE calls at my cellular supplier and within the telephone,(*1*)It kinda works however with problems.

When I am in my backyard or the lounge, and I disable mobile-data(for checking out) and allow wifi-calling – I will name with out a factor.(*1*)But if I am in my bed room which is like 1 wall away, it now not works.(*1*)The explanation I want the wifi-calling is as a result of I’ve a foul reception in my bed room, however the wifi connection is robust there, and I even examined with speed-test and were given just right download/add velocity in my bed room.

I have checked out my router configurations or even disabled 5G as partitions could cause problems with it, so I am the usage of 3G now.(*1*)Additionally close to the wifi icon I don’t see the letters VoLTE (even trough it’s enabled within the cellular networks and community mode is LTE/3F/2G auto attach).

In idea I will purchase a tool which makes the wifi sign more potent, however I do not see that this can be a downside because the sign is already robust in my bed room.

Any concepts?