Then you have the standalone card terminals that are more expensive because they connect directly to the internet to process payments.
The SumUp 3G card reader does this through a built-in SIM card with unlimited data for 3G connectivity – and it connects to WiFi too. This means you can take card payments anywhere with connectivity, even if the mobile network is weak.
Its card reader functions are quite basic: you simply enter the transaction amount, tap or insert a card and send a digital receipt following a transaction. There is also a charging and printing module that can be attached to the card reader for paper receipts and keeping the terminal charged all day.
Square Terminal only works with a closed WiFi network or broadband connection through an additional adaptor and cable (extra cost). Square Terminal does not have a SIM card, so it doesn’t work with mobile networks out and about. This means it is mainly intended for portability around your business premises, not in random locations at, for example, a client’s house.
Square Terminal is a smart POS terminal with a large touchscreen. The software on the card machine is basically the same as the Square Point of Sale app, but the terminal does not connect with a till point. It is intended as a standalone, portable checkout to carry around or as a small checkout-and-payments terminal on a small countertop.