Works in WiFi mode for sure. Most of the LTE phones will work that way. I test with several at work and use some without the SIM card to connect to WiFi only. I don't believe putting in a GSM SIM will work for international use.
Yes you can bypass the screen where you have to touch the android guy to access phone setup if you tap the top left of the screen then top right then bottom right then bottom left then top left and top right in that order. This mist be done on the screen after boot up qith no sim. The screen with the green android emblem and the emergency call buttons on the bottom. I hope this helpa.
When I reboot my RAZR WITHOUT a Sim card, I cant get past a motoblur login screen.
Yours works when you boot without a Sim card inserted?
Are you talking initial setup or just the general login/pin screen? I've never had any issues using mine without the SIM in it. I swap my SIM back and forth with my GNexus every couple days. I use them both on WiFi when they don't have the SIM.