Twili doesn't know how you are using SMS, hence they are being safe and giving you the warning.
I wrote up the following that should explain if you need to worry about this:
Come April 1st most mobile carriers are imposing limits on SMS on some telephone numbers when messages are sent from “unregistered” numbers if the SMS is used in certain ways. This is for many reasons, partly because of spam. In short, the carrier will block messages to/from these numbers or severely limit it.
If your telephone number is an “800” number and not a local number everything continues as before, no action needed.
Example:
- 866-111-2222 is excluded from the rules because it’s an 800 number
- 111-222-3333 is included in the new rules because it’s a “10 digit number”
If you are using 3CX as a “Person to Person” communication method everything continues as before, no action needed.
Example:
- SMS communications are 1:1 or 1:Many. This means there is a person sending the message, not a system. This is very important – a real human being has to send the message for it to be classed like this.
- The volume of messages per number is low (not a hard limit, but think under 200 per day)
- The send rate of messages is low (1 per second max)
If you are using 3CX as a “Application to Person” communication method, changes are happening and action is needed.
Example:
- Communications are in bulk (message these thousand customers the same message, etc.)
- Communications are sent by an automated system
- You need to send multiple messages per second or many messages per day
In this case you can still do so, we will just need to register your numbers in the SMS databases.
Doing so is fairly simple, I just need some information from you, specifically:
1. Legal Company Name
a. DBA or Brand name if different from Legal Company Name
2. Tax Number / ID/EIN
3. Legal Business Address
4. Will you use SMS for marketing purposes?
5. Will you use SMS for loan arrangements?
6. Will you be sending URLs in SMS?
7. Will you be sending Phone Numbers in SMS?
The capabilities of “Application to Person” phone numbers depend on which mobile carriers your recipients use. AT&T provides a limit on the number of message parts that can be sent each minute for each campaign. T-Mobile provides a daily limit of messages that can be sent for each company, with no limit on the number of message parts that can be sent per minute. Verizon hasn't published throughput limits, but uses a filtering system that is designed to remove spam, unsolicited messages, and abusive content, with less emphasis on the actual message throughput.
