Despite the sharp growth in the use of mobile devices in the context of travel, many research gaps are still present. The thesis brings as innovation the combination of constructs of technology acceptance models, personality traits and the moderation effect of the generations, aiming to propose and test a new model with structural equations. A qualitative exploratory phase was conducted with 15 interviewees, who provided indications for the composition of a survey applied in 912 respondents. Personality traits (introversion, openness to experiences, emotional instability, need for excitement) with internal aspects of the system (perceived utility, perceived ease of use, perceived trust and risk), and perceived ubiquitous connectivity were proposed. Finally, other relationships between the internal aspects of the system were proposed with the attitude when making purchases through mobile devices and the intention to purchase tourist products and services. A possible moderating effect of the generations on these relationships was also tested. In the generation X sample (N equal to 587), the openness to experiences had a significant effect on perceived utility and risk. The need for arousal had a significant effect on trust. Utility had a significant effect on attitude, as well as on perceived ease of use, trust and perceived ubiquitous connectivity. Perceived ubiquitous connectivity also had a significant effect on utility and on perceived ease of use. On the other hand, the attitude had a significant effect on purchase intention. The results on generation Y sample (N equal to 312) revealed that of all the personality traits tested, only the need for arousal had significant effect on trust. Similar to the generation X sample, utility had a significant effect on attitude, as well as on pereceived ease of use and trust. In the Y generation, perceived ubiquitous connectivity also had a significant effect on utility and on perceived ease of use, as well as attitude had a significant effect on purchase intention. In addition a few significant moderating effect of the generation was verified over some of the relationships proposed. Personality traits did not evidence to be so crucial in order to predict relationships with technology adoption constructs (e.g. ease of use, trust, risk, and usefulness), attitude, and purchase intent. However, the ubiquitous connectivity and the effect of generations on some elements of mobile devices purchase seem to be important elements to be included in future managerial analyzes in the context of mobile tourism.