From the beginning of using the phone, I have a problem with cyclical signal loss when I try to call someone or when someone tries to call me. I get a message that my SIM card is missing.
Interestingly, it happens just like I have the LTE signal turned on. When trying to establish a connection, LTE changes to 3G and it is at this point that the signal disappears, and then returns spontaneously after about 5 -10 seconds.
If I force the use of 3G, the connections work fine.
I tried to reset to factory settings, changed the SIM card between trays 1 and 2. I reset network settings. Unfortunately, nothing helps.
The only thing I haven't done yet is to exchange the card with the operator, but I treat it as a last resort. I do not believe that this was a physical malfunction of the card, because on the previous phone there were no problems.
It annoys me so much that I feel like throwing this phone out the window...