Hi, I am having the N8 for the past 4 months or so, but 20 days before my outgoing calls completely, even after normal is to reboot the phone, so there is no return. However, I could send sms, receive calls and access the Internet. I can check with Vodafone, and even said that there was no problem on their side and all payments of invoices received by them in time. So I decided to try replacing the SIM card with SIM card from my friend and use the phone. Surprisingly, outgoing calls were. After that I went to put my old sim in the phone again and outgoing calls had begun to function well. The problem now is that outgoing calls were occurring frequently, and make at least 5 times in the last 15 days.