Tethering depends on the network and device.
GSMA SIM Cards: Tethering is supported on Android Devices. Tethering/Hotspot will will not work on iOS Devices.
CDMA SIM Cards: Tethering i supported on iOS Devices. Please contact support to enable tethering on your account for free! Tethering/Hotspot will not work on Android Devices.
GSMT SIM Cards and CDMAS SIM Cards/Devices: Tethering is supported on both Android and iOS Devices.