Wi-fi Wi-Fi is a popular wireless networking technology using radio waves to provide high-speed network connections that allows devices to communicate without cords or cables, Wi-Fi is increasingly becoming the preferred mode of internet connectivity all over the world. SIM cards can also be used by a phone to store limited amounts of data, such as phone numbers and text messages.īluetooth Bluetooth is a wireless communications technology for exchanging data between mobile phones, headsets, computers and other network devices over short distances without wires, Bluetooth technology was primarily designed to support simple wireless networking of personal consumer devices. Moving a SIM card from one phone to another allows a subscriber to switch mobile phones without having to contact their mobile network carrier. The SIM card is most commonly associated with GSM and UMTS mobile networks. This allows the phone using the card to attach to a mobile network. SIM SIM (Subscriber Identity Module) is a small card that contains mobile network subscriber's account information.
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