Hello, I have just bought this phone a few days ago and changed added the SIM card (from Swiss) but the data connectivity is not working. Only if I connect to Wifi it works. I have re-started it several times and activated the data mobile, roaming etc and is still not working. Does it require unblocking since the SIM card is from Swiss? I'm using Lycamobile and I can see it finds the network and is connected to it, but I don't receive any data connectivity..