Trouble of SMS delay

At present, there are many companies providing short message service, with different quality and price. . If you are strict, it is recommended to find a good 16 gateway channel. Generally, if you are a member of the mobile 16 gateway, there will be no delay after passing the white list authentication (providing the customer number to the mobile). . If you feel the same trouble as our company, you can use a slightly worse telecom gateway channel. At least, the telecom web page of "I send MMS" used by our hotel has no delay in sending and receiving SMS on Thursdays and Fridays and holidays. You can also test it. . .

the above is for reference only. . .