Which SMS gateway to choose for receiving and sending messages?

Question

SMS

There are many similar questions in Q&A, but in addition to the standard set, I need the following:
● The ability to specify a custom handler for notification when the gateway receives sms messages. Those. such a scheme of work - I send sms to the virtual number of the gateway, it receives sms and my handler is called, in which it transmits the text of the message and the sender's number. The option when you need to request the list of incoming sms from the gateway is not needed.
● Russian-speaking tech. support

Answer 1

smsc.ru
Transfer of statuses and messages to the Client's handler
smsc.ru/api/http/#callback