The iPad 2 uses a microSIM for cellular connectivity. This means you need a physical microSIM card from a carrier to connect to cellular networks and access mobile data.
However, there are a couple of workarounds if you don't want to use a SIM card:
* Wi-Fi only: The iPad 2 can be used entirely with Wi-Fi. You can connect to your home Wi-Fi network, public Wi-Fi hotspots, or a mobile hotspot from your phone.
* Virtual SIM: Some carriers offer eSIM support, which allows you to activate a SIM card digitally without needing a physical card. However, the iPad 2 is not compatible with eSIM technology.
In conclusion, you need a microSIM card to use the cellular capabilities of an iPad 2.