The 2G network is a threat, but fortunately it can be deactivated

The 2G network, developed in 1991, should theoretically no longer be applicable due to the spread of 4G and the slow conquest of the market by 5G. It turns out, however, that it is still used, and this is a problem due to its low security level, which makes the 2G network a threat. This was confirmed by the case of the US Department of Homeland Security, when three years ago it detected fake repeaters in Washington that intercepted unencrypted information sent over the 2G cellular network in the form of messages, phone calls or photos.

Android finally lets you deactivate the 2G network. However, the solution is not for everyone

Interestingly, 2G networks are still used during phone calls by operators without VoLTE technology, or when connecting some older IoT devices. Her disadvantages? In addition to the low transfer rate, 2G has very weak encryption between the repeater and the mobile phone and does not authenticate with the 2G tower in any way, so it can be impersonated.

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The 5G network is completely free from such mishaps, because a permanent identifier (SUPI) has been implemented in it, thanks to which it uses the network operator’s encryption key and allows the smartphone to verify the transmitters. Good news also came from us from the EFF (Electronic Frontier Foundation), according to which Android will finally allow 2G to be turned off in its settings. Google started introducing this at the end of last year (you will find the option in the SIM card customization menu).

Unfortunately, this requires a slightly newer smartphone, and it can still cause problems for some. What exactly? By far the most important problem may be the loss of coverage or problems with making phone calls in people living in areas dependent on 2G.