How to choose a reliable SMS group sending platform?

Now there are many short message companies, both formal and informal, and it is very troublesome for customers to choose. Choose a good SMS company, first look at the company qualification certificate and the whole network certificate, because the whole network proves that there is no company without strength. Looking at the registered capital, it is best to look at the service attitude and quality. The current short message service is not very stable, and sometimes there will be problems, so you definitely need to complain. If the service is handled well, the SMS company will be good. Companies that do data transactions are companies that are not responsible for customers. This is personal advice, because I am in the SMS industry. I understand that many customers are worried about this problem, so I feel helpless about this market. If you have any questions, you can ask me.