What is the cheapest way to send text messages by mobile phone?

Mobile has no service of sending out-of-network information, and sending out-of-network information is cheaper, 0. 15 yuan/piece. The cheapest way to send out-of-network information is PHS, followed by Unicom, which has a new power card that can package (send) out-of-network information. The most expensive thing is moving. If you can change the number, you can change it to Unicom or PHS. If you don't want to change it, you can consider using network software to send it, as long as you open GPRS monthly subscription. The following software can be used for free: being a guest at zozoc, supporting Unicom, Mobile and PHS (in some areas); Apple PingCo supports Unicom and mobile. However, in network software, information may be delayed or lost. Besides, there may be advertisements. PS: Is there a M-Zone SMS package outside the package network? Have you moved out of new business? When did it come out? Just now? Is it possible? Maybe I haven't paid attention to these things on the internet for too long, and I'm confused … or the man upstairs is smart!