Hi @Darjan, I'm here to help you and I invite you to follow this procedure: move the network to 2g (3g if Iphone), restart the device and when you turn it back on, move the signal back to 4g. Have you tried to test the functioning of your SIM ho. in another device? If you need support send me your request privately, indicating the number, name and surname of the holder. I will provide you with support asap. Good day!