Simply insert an active SIM, mini SIM, nano SIM or micro-SIM card (using SIM adapter) into the SIM slot on the bottom of this unit and then connect with any kind of desk phone. Users can put in pre-paid or regular SIM card into this device and connected with corded/cordless phone so they can make calls or receive calls through 4G LTE, 3G WCDMA and 2G GSM networks.
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