Purpose of this study is to make readers understand the intention to use mobile banking through the theoretical triangulation of TAM and TRA models. Previous studies related to the topic were based either on conventional banking or either from other Muslim countries than Pakistan. However, this study has not only been conducted concerning the largest Muslim country but also through the thorough model that has been based on theoretical triangulation. Hence, the rigor and impact of this study might outstand the previous research work. Therefore, to compile this study effectively data has been collected from 383 customers through convenience sampling. Analysis has been made through SMART-PLS and the findings of the study confirmed that theoretical triangulation is an effective tool for the selection of variables. The claim is true as this study's findings indicate the positive impact of customers' attitudes on their intention to use mobile banking services from Islamic banks. Moreover, detailed statistical testing also indicated that the impact is not only true for PU but has a definite impact on customer’s attitudes as well as intentions to use Islamic Mobile Banking. However, PEoU does not directly or indirectly affect the attitude and intention to use mobile banking. Hence, the findings of the study indicate that there is a need for more rigorous studies to explore theoretical triangulation and models for comparative studies between conventional and Islamic Banking.