Messages sent strange characters

Talk with Clickatell support team and check this official API documentation: https://archive.clickatell.com/developers/api-docs/http-sending-messages/:

The text content of the message. Note that some characters take up two character spaces due to of GSM encoding standards.

Kind regards.

thanks for the quick answer!

I have talking with them, but is taking to long. they have been passing information to one and other.
the only thing I can think right now is to enable in panel:

Enable message parts

Enabling message parts allows you to send messages longer than the maximum length allowed. Messages are split into smaller parts, recombined at the receiving end to appear as one SMS to the recipient. Note that you will be charged for each message part.

I’m guessing that’s a stupid idea, but this is all I can do on clickatell dashboard…

thanks anyway!

Try that and change line 17 in file /includes/admin/proveedores.php from this:
$respuesta = wp_remote_get( "https://api.clickatell.com/http/sendmsg?api_id=" . $apg_sms_settings['identificador_clickatell'] . "&user=" . $apg_sms_settings['usuario_clickatell'] . "&password=" . $apg_sms_settings['contrasena_clickatell'] . "&to=" . $telefono . "&text=" . apg_sms_codifica_el_mensaje( $mensaje ) );
To this:
$respuesta = wp_remote_get( "https://api.clickatell.com/http/sendmsg?api_id=" . $apg_sms_settings['identificador_clickatell'] . "&user=" . $apg_sms_settings['usuario_clickatell'] . "&password=" . $apg_sms_settings['contrasena_clickatell'] . "&to=" . $telefono . "&text=" . apg_sms_codifica_el_mensaje( $mensaje ) . "&unicode=1" );

If this work, we’ll change it on the next update.

Kind regards.

thanks! but the &unicode=1 didn’t work…
I have save the settings, disable the plugin and enable again and the message wasn’t sent.