Character count: check your SMS text length

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SMS - Wikipedia

What is the maximum length of an SMS text message? - The SMS Works

iPhone: How to enable character counter in the Messages app - 9to5Mac

Creating SMS content - TalkBox Support Centre

How to measure your SMS character count, and the process of concatenation

When Twitter expanded tweets from 140 to 280 characters, political discussion got more civil. - The Washington Post

SMS Message Length Calculator

Send and reply to messages on iPhone - Apple Support

iPhone: How to enable character counter in the Messages app - 9to5Mac

Why is the character limit message trying to trick me? - Meta Stack Exchange

How to set up a Peer to Peer Texting campaign? – CallHub Customer Support