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GitHub - alvinmurimi/Huawei-E3531-Modem-mode-switch: Python script for switching a Huawei E3531 USB modem into modem mode
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Huawei E3531 - Modem USB HSPA+, color negro libre, 3.5 g : Amazon.es: Informática
Modems and Routers :: Unlocked Huawei E3531 3G HSPA 21Mbps USB Surfstick Modem Dongle WCDMA 900/2100MHz