Читать книгу iPad and iPad Pro For Dummies - Bob LeVitus - Страница 24

As of this writing, wireless carriers offer several data networks relevant to the iPad. Only the third-generation and later iPads can take advantage of the speediest 4G or LTE networks. AT&T has a form of LTE the company misleadingly calls 5G. 3G is slower than 4G and LTE, and EDGE and GPRS are slower still. Your iPad starts by trying to connect to the fastest network it supports. If it makes a connection, you see the appropriate cellular icon on the status bar.

Most Wi-Fi networks, however, are faster than even the fastest 4G cellular network. So, because all iPads can connect to a Wi-Fi network if one is available, they do so, even when a cellular network is also available.

Last but not least, if you don’t see 5G, 4G, LTE, 3G, GPRS, E (for EDGE), or the Wi-Fi icon, you don’t currently have Internet access.