How to interface 3G usb modem to any ARM (Android / linux ported) Board. Hi I am now going to provide quick steps to interface the 3G usb modem to linux/ Android SBC which i have tried during my try which is successful one . More and more USB devices when plugged in for the first time they act like a flash storage and start installing the driver from there. After installation (and on every consecutive plugging) the driver switches the mode internally, the storage device vanishes (in most cases), and a new device (like an USB modem) shows up. Few modems (Huawie) most of time they do not need to switch from mass storage to usb modem mode. When you connect that modem to USB port then it will be detected as ttyUSB (3 ttyUSB ports are detected). Otherwise you need to switch the mode of usb modem by using usb_modeswitch utility (I am giving examples of idea modem / reliance modem which are from Huawei and a dlink 3G modem which requires usb modeswitch). Follow the steps to
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