Poynt devices can be either WI-FI or 3G enabled. For a WI-FI enabled device, simply power it up and connect to a secure wireless network to use it.
For a 3G enabled device, the type of SIM card needed is dependent on the model of the Poynt device. P5 and P61 V2 devices require a Nano SIM card (4FF) and P61 V1 devices require Micro SIM card (3FF).