I have a Huawei Y6 2019 and a Winsim SIM card.
Since Friday evening I have almost no reception, Saturday morning it was short again. Wi-Fi works and my foreign SIM card, which is in slot 2, also works. In Android, the SIM card is shown as light blue under Settings> Wireless and networks → Cellular network, not as dark blue. I attach a screenshot. What can that be? Is the SIM card defective, do I need a new one? I don't think so, because emergency calls are still possible.
Your SIM card may be blocked
Call customer service
Otherwise reset the cell phone or you can try another SIM card in the cell phone beforehand
