On April 16, 2026, I started a subscription through Turkcell Superbox with the “Superbox 5G Home 1 TB” package. However, on only the 14th day of usage, April 30, 2026, I encountered a data consumption report that is completely inconsistent with normal usage patterns and technical measurements. While Turkcell’s official app shows my usage as 868.29 GB, the modem interface’s hardware counters show total data usage of only 398.45 GB for the same date and time. The difference between these two figures is approximately 470 GB, meaning the operator’s reported usage is about 2.18 times higher than what the modem hardware measured.
Considering that a modem counts every bit passing through its network card, such an excessive difference from the operator’s system raises serious questions about the reliability of Turkcell’s measurement algorithms, beyond just a simple technical error. During this usage period, I did not perform any high-volume data transfers such as torrenting, server uploads, or similar activity. My usage was limited to routine social media activity and standard video streaming.
Compared with the more reasonable data consumption I have observed during international roaming, the unusually fast depletion of data on the local network clearly shows that data usage criteria should not be left solely to the discretion of GSM companies and must be urgently inspected by BTK. A consumer’s right to know which service they are receiving, at what unit price, and through which measurement method is protected under Law No. 6502 on Consumer Protection.
My subscription number is 5356****02. Although I contacted Turkcell through Twitter, I have not received any response so far. I request that Turkcell provide a detailed technical explanation for the 469.84 GB discrepancy between the 868.29 GB shown in the app and the 398.45 GB measured by the modem hardware. I also request that the incorrectly deducted quota be restored to my line while the issue is being investigated. In addition, I expect a transparent breakdown—preferably supported by LOG records—showing how data measurement standards such as IP overhead, signaling traffic, and similar factors are deducted from the user’s package.
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