After a few struggle, I have made a great collection for download link of Huawei E303 Modem (Data-Card) firmware. Recently, I had shared with you a huge firmware download list of Etisalat Huawei Modems and Routers.
Idea E303 of India and Safaricom E303 from Kenya comes with customized firmware, so don’t use on another network modems. For unlocking codes of Huawei E303 Modem is also available in cheap rates.
Note : Firmware version starting with 22 is for hilink modem, don’t update the normal modem, otherwise your modem may be dead.