Abstract Problem statement – what factors determine brand loyalty in Smartphone? Purpose – The purpose of this study is to examine causal antecedent factors leading to brandloyalty in the Swedish Smartphone market Theory – theoretical review and critical analysis of academic journals related to dependantand independent variables and conceptual model is formulated. Methodology - Quantitative approach is used to quantify the relationship between dependantand independent variables based on the proposed theoretical model that delineates therelationships between dependant variable brand loyalty and the independent variablescustomer satisfaction, perceived quality, brand experience, brand image, brand switching costand product involvement. Data – In total 200 responses were collected through a structured interview from UppsalaUniversity, Uppsala central train and bus station and two big shopping centers in Uppsala (S: tper galleria and Forum galleria). Apple and Sony Ericsson brand users are interviewed in thedata gathering process, 100 respondents for each brand Findings – the analysis suggest brand image, product involvement and customer satisfactiondetermined brand loyalty in Apple brand, whereas customer satisfaction was the onlydeterminate factor in Sony Ericsson brand