What does it mean for the elderly to send text messages with a usage of 0.29 this month?

SMS reminder traffic is 0.29 yuan /m, and old man-machine usually refers to mobile phone products suitable for middle-aged and elderly people. This product has a single function. Mobile phones for the elderly are widely used by the elderly, which has had an important impact on the popularity of telecommunications terminals in the country, enabling odd old people to fully experience modern life and have telephone and SMS functions to meet daily use. This month, the SMS reminder flow of the mobile phone for the elderly is 0.29 yuan /M, so use it with caution.