What is the latest billing model for Mexican numbers?

What is the latest billing model for Mexican numbers?

WhatsApp started to experiment with a new pricing model in Mexico in February 2021.

Under the new pricing model, Mexican numbers will be charged per conversation instead of per template message. For more information, please see the WhatsApp documentation here.

Please note that the first 1,500 conversations are free, after that they will be charged at the following rates.

For example, in March there were 2867 conversations

The first 1500 are free, so 2867 - 1500 = 1367 conversations
The price for March is 1367 x $0.014 = $19.138 USD

WhatsApp's definition of a conversation
WhatsApp defines a conversation as a 24-hour session of unlimited messaging between a person and a business. The 24-hour conversation session begins when:
  1. A business-initiated message is delivered to a user, outside of a 24-hour window
  2. A business reply to a user message is delivered within the 24-hour window
In both cases, the conversation session begins when the business’ message is delivered.
​When businesses initiate messages to users (templated messages), a conversation will be initiated regardless of whether users reply to that message within the next 24 hours. There is no limit on the number of messages a business and a user can exchange in a single 24-hour conversation session.