Huawei e5573 can be used as a wireless modem when the Wi-Fi is enabled. All you need to do is insert a sim card of your choice as it is unlocked then the device is ready to use. A maximum of ten wireless users can access the e5573 at the same time. The e5573 allows you to access the Internet via LTE/4G or Wi-Fi. When you are using the e5573 in areas with a Wi-Fi hotspot, for example, an airport, a cafe, a hotel, or your home, the e5573 switches to Wi-Fi connection automatically, saving your LTE/4G network traffic fees.