Sms's are text messages sent to a mobile device with a maximum length of 160 characters. It is possible to send sms's longer than 160 characters using sms concatenation.

Longer sms's are essentially broken up into into a number of sms's and are charged as shown below:

0-160 characters	1 sms credit
161-306 characters	2 sms credits
307-459 characters	3 sms credits
460-612 characters	4 sms credits

Select the required level to limit the allowed maximum length of submitted sms.

If you submit sms longer than the configured level, they will be failed!