Is there a charge for texting between large customer groups?

For the SMS channel (106) applied by the large customer group number, there must be a charge for sending SMS. The sender shows the port number starting with 106. They all cooperate with third-party SMS companies, provided that they buy SMS packages at a unit price of a few cents, which is much cheaper than texting on mobile phones. If their monthly delivery volume is particularly large, they can also directly cooperate with the three major operators and have exclusive SMS channels, such as the bank number segment starting with 955.

Users receive a large number of short messages and want to reply to the content. As long as they are in their own mobile phone package, there is no extra charge. If the monthly subscription number of mobile phones has been used up, there will be an extra charge.

Whether sending a short message through a regular short message channel 106 or using a personal mobile phone short message app, the receiver can only be a normal mobile phone number, and the problematic numbers such as the landline or empty number or the port number at the beginning of 106 cannot be received, and the gateway operator system cannot recognize it.