Distributing a long SMS? Keep track of how many SMS you are actually distributing. 

Without Special (Unicode)

Characters: 1 SMS = 160 characters
2nd SMS = 153 characters + 153 characters = 306 characters.
If a 307th character is added, we’ll count it as 3rd SMS.

Once you cross 160 characters the system will let you know:

With Special (Unicode)

Characters: 1 SMS = 70 characters
2nd SMS = 67 characters + 67 characters = 134 Characters.
If the 135th character is added, we’ll count it as 3 SMS.

Merging codes

In case you use merge codes in your SMS, the count displayed is an approximate one as it depends on the data pulled from your database.