My phone is sending texts without my knowledge?

[Android Central Question]

Samsung Note 4. I keep getting the following text message many times a week:
Messages to this country code are not supported. This message was not delivered. Mensajes a este codigo de pais no se compatible. Mensaje no se entrego. The number it is trying to end to is +5355206360. I am not sending anything to this number.

 

[SpookDroid]

Have you installed any shady apps lately? You should check the permission list for any apps with access to SMS as one of those is obviously texting a number in that country, probably for paid subscriptions or services.