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Frequently asked questions
How long can an SMS be?
An SMS can be up to 160 characters long. If you want to send a longer text, it will automatically be split into parts of 153 characters (7 characters in each message are used for information that allows the text to appear as a single message on the recipient's phone). This is standard SMS behavior according to the GSM standard, the same for all providers.
How to verify SMS length?
When using the form in the web application, we show you the message price, character count, and number of SMS parts used before sending. You can also use our SMS length checker tool.
Is it possible to find out if a message was read?
No. Within the GSM standard, there is no way to determine whether a message was read. You can only find out whether the message was sent (i.e., whether the phone number is in a valid format) and whether the message was delivered to the recipient's phone. In practice, the number of clicks on a URL in the SMS message is measured to (among other things) consider the SMS as read.