The third generation (3G) mobile channels allow individuals to download digital content in anytime, at anywhere. The 3G mobile services include services like peer chatting, mobile games and movie download. While many studies explore why individuals adopt 3G mobile services, most of them consider 3G adoption to be a new technology adoption. Will users’ experience on older version of mobile services (e.g. 2G and 2.5G) influence their adoption decision on their 3G adoption? Hypotheses linking variables based on diffusion innovation technology and user’s mobile services usage background were developed. We conducted a survey and collected 175 responses. Our findings establish that different factors affecting users who have used the older version of mobile services and users’ decision to use or not to use 3G mobile services is a service upgrade decision, rather than an adoption decision.