A town where three districts meet
Katwa has always been a meeting point: two rivers, three districts, four railway lines. Its businesses inherit that. A rice mill's buyers may be in Nadia or Murshidabad, a sweet shop's wedding order may come from a village across the Ajay, and a guest house's pilgrims arrive by train from Bandel or Bardhaman.
None of that changes the cost of a message. Meta bills by the recipient's country code, so every Indian number pays the same India rate. What it changes is who writes first. When a customer does, every answer for 24 hours is a reply; when the business has to speak first, a confirmation, a reminder, a dispatch note, the message is an approved template in Bengali, Hindi or English.