If there is a sound connection, but no image on the mobile phone, this is because the data throughput is too low. The connection is then too weak, for example H+ or outside the data bundle (less/lower data transport) or if the firewalls and other security measures on the modem/router are set high. 2. Best connection is at 3 or 4 G and if no security measures are blocking the transmission. Normally, if the connection is weak, sound will be transmitted first and if you wait a while, the picture will be transmitted as well. These are two separate streams and sound will always be transmitted first.

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