Some people are always closing their handsets, so it's difficult to inform them.
Why not send them short messages?
Can short messages reach them?
Short messages will be kept in the short messages center. Once they open the handsets they will receive them, which is better than you can't find them.
Why haven't I thought of this skill?
I use short messages quite a lot. If it's not too complicated I will send a short message, which can save much phone charge.
I am informed that many people used short messages to pay a New Year call, and only on the Spring Festival it amounted to 1 billion this year, didn't it?
I almost can't live without messages, from which I learn about weather forecasts and stock quotations.