The first two weeks after the purchase of this device, I liked almost everything. Worked well and well. But about twenty days later, I began to notice difficulties with sending photos via vatsap - for an unacceptably long time, as if the operator’s Internet suddenly became GPRS or it didn’t exist at all. From that moment on, I began to systematically take speedtest measurements in different places of stay. And then it all became clear. It turned out that if the antenna of this Samsung works in the normal mode, then it gives out speeds for downloading under a hundred, for unloading 20-30 megabits. Which, in fact, is completely normal for mobile Internet on a SIM card from Megafon. But often the receiver for some reason "fell off" and at such moments the test gave out no more than 30 on upload, and on uploading to the network either hundredths of a megabit (0.01 for example), or in general, the speedtest could not complete the measurement and gave out something like : "can't complete test, please check your internet connection". By the way, at such moments there was always another mobile device from Samsung with a SIM card from a megaphone nearby, but only from the flagship line and from 2022. And here on it at the same time the measurements were quite adequate for this operator - the values were announced earlier. That is, you can’t blame it on local network failures. So, after another week of such monitoring of data transmission, this miracle device reliably switched to the mode of stabilizing the malfunction of the transmitter. Exactly one month after the purchase, it was handed over for warranty service through the appropriate department of the store of its purchase (amazon). There he was exactly 45 days as it should be according to the law. On the 46th day, the store offered a choice. Naively assuming that it was an accident, he recklessly chose an exchange for a similar product. But having received a new phone, providing SIM cards and a flash drive, restoring my Google account, I was not too lazy to immediately launch the same application from "ookla" for the sake of interest. And what would you think? Yes, it's the same! The first measurement again showed a similar failure of data transfer: upload - 0.01 Mbit
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