A few days ago, I bought a new NF 2 and updated it step by step until I reached the latest version, 1451-EEA. The phone worked completely normally for a while, but then it started not receiving calls. I can make calls, send SMS messages, and I have internet, but when someone calls me, I am unreachable. I reset everything I could, but nothing worked. Then I did a factory reset, and everything started working again. It worked for a while, and then the same problem occurred again. I can make calls, but people cannot call me. Is there a fix for this problem? How can I revert to a stable version before the 3.2 update? It seems to me that this starts happening when the phone goes into deep sleep, and then it cannot receive calls. I have removed the SIM card, swapped its slots, turned airplane mode on and off, etc.
