Free SMS software

First, the free software of operators, namely Unicom's Superletter and Mobile Fetion, are official and stable, and it is unlikely that information will be lost. However, they can only send messages within the network. Second, other free software: guest ZOZOC, support mobile, Unicom, PHS (in some areas); Apple Pingco supports Unicom and mobile; I have Sina in my palm, but I personally feel that it is not easy to use. S40V3 doesn't work at all … Third, it's not software, but it can send or send a certain amount of free information for free: mobile 139 mailbox, 30 short messages and 20 multimedia messages; Mobile login /wap/sms/index.php#C 1 can also be sent. It is said that Sina gateway is made of …