As I transition from to Constant Contact, I need the ability to send a single text message even when the character limit exceeds 160. This convenience in Constant Contact's SMS messaging system is a reassuring aspect of the transition.
From SMS Features:
"The number of characters in an SMS determines the number of individual text messages required to complete a send. The type of content you send also impacts the message count. Text messages exceeding a single message's character limit are split into separate or multipart messages, requiring individual SMS credits.
With SMS marketing, you can send two types of SMS: standard message (GSM) and Unicode (non-GSM).
Global System for Mobile Communications (GSM) is a standard character set that uses the letters A-Z and numbers 0-9 with some special characters. Unicode includes a larger range of characters. SMS sent with GSM can contain more characters than messages sent with Unicode.
Standard (GSM)
160 characters per 1 SMS
153 characters for multipart sends (2+ SMS)
Unicode (non-GSM)
70 characters per 1 SMS
67 characters for multipart sends (2+ SMS)
If your SMS requires more than 1 text message to send, it'll automatically send as a multipart message with a different character limit. Modern smartphones reassemble multipart messages so that they appear to be 1 message for your recipients."
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