So I went to buy completely new phone. How big my surprise was, when my SIM card just didn't want to fit in there. Is that even possible, I asked. "Yes," the operator said, "it's pretty normal. We can cut it for you, if you wish." Cut a SIM card? Never heard of that. Another okay, let's do that. Now it's working fine and I just think that when we can install downgrades on Windows, why not to cut SIM cards, too?!