NOTE:

• It is HIGHLY NOT ADVISABLEto copy/paste the message content from document processor softwares, such as Microsoft Word, as they may contain incompatible character encoding.
• GSM-7BIT extended characters will consume 2 spaces in the SMS, these characters are ^ { } \ [ ~ ] | 
• Using GSM-7BIT encoding, the maximum message length is 160 characters/SMS for single SMS and 152 characters/SMS for multiple SMS's
• UsingUNICODE encoding, the maximum message length is 70 characters/SMS for single SMS and 67 characters/SMS for multiple SMS's

Read more about SMS on this link: http://en.wikipedia.org/wiki/Short_Message_Service