Note: You can also be asked to activate the Voice assistant where you will be asked to record "Ok Google" three times.
You can also watch this video for detailed information about Google Assistant
You can check the complete specs here: Google Pixel 3
Check the steps to insert sim:-
A video for your reference:
You can find complete specifications here: Google Pixel 3
There are two ways to take screen shot in upcoming android P 9.0 devices including Google Pixel 3 and Pixel 3 XL.
Press and hold the power button and volume down button at same time to take screenshot
In upcoming android P 9.0 device (Pixel 3 & Pixel 3 XL), you will capture screenshot using power button menu.
Open page you want to take screenshot > Long press power button > Screenshot
The launch of Google Pixel 3 Mini is rumored and it might launch in Q4 2018.