We are talking about smartphones with an old operating system. The official website of WhatsApp says that the application can fully work only on devices with new firmware and provided that the phone receives SMS messages or calls while confirming the number. If the smartphone works only on a Wi-Fi network, then the application will function in a limited mode.
The developers recommend that users switch to a supported device or keep their chat history up to date. Otherwise, you won’t be able to read old messages.
It is noted that restrictions for operating systems are set so that when using older versions, attackers cannot gain access to someone else’s correspondence. At the same time, experts fear that such innovations may affect a large number of people who are not chasing fashion for phones.
According to a poll by VTsIOM, WhatsApp is the most popular messenger as of February this year. The top three also include Viber and Telegram.