I don't know about other countries, but in India at least, SMS's are generally paid and won't send if you don't have balance. While WhatsApp/Telegram messages

I don't know about other countries, but in India at least, SMS's are generally paid and won't send if you don't have balance. While WhatsApp/Telegram messages are actually free if you have got data. And nowadays I get absolutely zero SMS's from people. All senders are now just bots and notification services.