1. In India it is normally a 1-800 series Toll free number (can be other numbers as well as 000800 starting). Which can dialed by anyone across the country and the person dialing the number is NOT charged.
2. The company that owns the Toll Free number has to then bear the charges of that no-call cost for the end-customer and has to pay an extra premium per call.
3. You can only RECEIVE Incoming calls on the Toll-Free Number. This can diverted and forwarded the way you want using us. No dialing out from the Toll-Free number. <Many aren’t aware of this>
4. No SMS’s are possible on the Toll-Free number, and the sender ID on SMS’s are typically anyway from a 6 character. Sender ID for Transactional or a random digit series for Promotional unless you have taken a Long/Shortcode.
So Typically Businesses which are slightly large (not SME’s). They can spend an extra amount of money on each call to make their end customers feel that they are valued. Hence It is more an emotional + comforting style of marketing & branding (soft power types) to make the end consumer value their time and MONEY. You would make it a central number for 1 campaign or all your queries depends on the business.