Overall, the modem performs admirably. Two antenna inputs was a deal breaker for me. You can't have a phone conversation in every room of my dacha, and forget about getting online without installing high-gain antennas. To get 4g Internet at speeds of 15-20 Mbps, I installed a satellite dish on the roof and purchased a 3g - 4g irradiator (total cost: less than $4000). To deal with the newly installed modem firmware, I employed the "needle method" and erased any "bad blocks" from memory. You can get a comprehensive breakdown of all the fixes on the w3bsit3-dns. Com forum. If you're not familiar with firmware and encounter a problem like mine, I recommend making a beeline for the nearest service center. The forums indicate, however, that the frequency of firmware failures in these modems is vanishingly small. This Huawei B310 is a secure purchase. Also, the B310S-22 that is available now is identical to the B310. The B310S-22 I recently purchased from Amazon was $500 less than elsewhere.
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