Consult:
- GSM/UMTS mobile communications systems - Assessment of the quality of the short message service (SMS) and multimedia messaging service (MMS) https://www.anacom.pt/render.jsp?contentId=1130232
Report on the assessment study of the quality of the short message service (SMS) and multimedia messaging service (MMS)
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By determination of 9 March 2010 ANACOM approved the report on the assessment study of the quality of the short message service (SMS) and multimedia messaging service (MMS) provided by operators OPTIMUS, TMN and Vodafone Portugal.
