How do mobile operators in Ukraine know that you are distributing the Internet from a smartphone
Almost all mobile operators have a special tariff for the router. It would seem that why such difficulties, if you can just distribute Wi-Fi from a smartphone? We understand why you need a SIM card for the Internet.
The reason why you can’t share the Internet freely from a mobile device is that each data packet has a lifetime. In the IPv4 standard, this indicator is called TTL (Time to live), IPv6 – Hop Limit (from English hop – jump).
In any case, this means the number of iterations or transitions between devices that is possible for each data set. Thanks to TTL, packets do not roam the network indefinitely, but are destroyed after a certain number of shipments. For the user, the end of the packet life looks like the message “Response timeout from server”, “Timeout exceeded”, etc.
Initially, TTL was supposed to be measured in seconds, but as a result, it’s just units denoting the maximum number of iterations. The maximum possible number of shipments is 225, but different systems have their own values.
For example, the TTL for Windows is 128, and for iOS and Android the initial value is 64. This is one of the reasons why the Internet on a Windows computer is more stable than on a tablet or smartphone – packets can be sent more than once.
At the same time when sending a packet, ie with each new device, the TTL decreases by one. And if you distributed the Internet from a smartphone to a tablet, the iteration is complete, and the lifetime of the package is already 63 units. Because all data is transmitted through the provider, it notices this change and blocks the distribution.
Of course, many operators have an Internet package that you can distribute for free from your device, but it is usually no more than 30-50 MB. So for full access from all gadgets in the country or on the road, unfortunately, you will need a router and modem and a SIM card with a special rate.