Can you spot a device like this : https://www.intersign.dk/cdn/shop/products/868e2a0dce897d05afc0a7cafdf4c974.jpg https://www.intersign.dk/cdn/shop/products/868

Can you spot a device like this : https://www.intersign.dk/cdn/shop/products/868e2a0dce897d05afc0a7cafdf4c974.jpg https://www.intersign.dk/cdn/shop/products/868e2a0dce897d05a... The linked image shows a module meant for easy integration, but it could also simply be a part of the main board of the TV. They could "hide" the GSM antenna alongside the wifi antenna.