You can type the long message into the system. The system will count the characters and show how many SMS will be deducted.
For further assistance, do raise a support ticket with our Support Team at firstname.lastname@example.org.
What is the maximum characters per SMS I can put into the message?
Is there a limit to how many numbers I can send at one time?
Is there any resend function if the mobile phone is not turned on or there is no coverage at that moment?