6 of 7 people found the following review helpful
Huawei E5331 Mi-Fi modem failed within a month,
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This review is from: Huawei E5331 High Speed 3G 21.1Mbps Mi-Fi Unlocked Modem (Electronics)
Device failed within a month. Stopped connecting to internet: the bars showed red whatever I did, including obtaining a new SIM. I know it was the Huawei modem that failed because I transferred the SIM to a ZTE MF60 and it worked fine.