The objectives of this research are 1) to know the attitude of Telkomsel customers to Nada Sambung Pribadi (NSP) 1212, and 2) to know what factors of attitude are the most influence factors of Telkomsel customers to use Nada Sambung Pribadi (NSP) 1212. Research finding has shown that generally Telkomsel customers have good attitude to NSP. The most influence factors of attitude that make Telkom…