AT&T Users Not Getting SMS | Shows 30007 Error from Sender Side
My customers are complaining they are not getting my SMS which includes a zoom link for them to join an interview.
They give their consent before we send sms and also rest of the courier services we're not getting much complaint.
We're using Twilio to send the SMS to our customers.
I would like to know if there's a process we've to register with AT&T or something?
We're already A2P 10DLC registered and not getting any issue sending the same messages on other courier services.