2. In addition to the information provided for in paragraph 1, customers shall have the right to request and receive, free of charge, and irrespective of their location within the Union, more detailed personalised pricing information on the roaming charges that apply in the visited network to voice calls and SMS messages, and information on the transparency measures applicable by virtue of this Regulation, by means of a mobile voice call or by SMS messages. Such a request shall be to a free-of-charge number designated for this purpose by the roaming provider. Obligations provided for in paragraph 1 shall not apply to devices which do not support SMS functionality.