Integration of technology in task-based language teaching (TBLT) has long been a source of attraction for language teachers (Pierson, 2015). In the case of developing countries, such as Pakistan, mobile phones are the modern form of technology commonly available at low cost to individuals as well as institutions. The present descriptive case study explores the impact of ubiquitous smartphones and a TBLT approach on students' and teachers' perception and motivation in improving English writing skills. A mixed method approach was used to explore the qualitative and quantitative data. Smartphones were used to complete writing tasks on blogs. The results of the study reveal that using smartphones, combined with a TBLT approach, created learning environments which promote self-confidence and interaction with the teacher and peers. It also helped the teacher in providing individual feedback to the students, improving students' engagement in learning tasks as well as self-expression in English.