According to a study, one of the most common uses of a mobile phone is listening to music and watching movies rather than making phone calls and sending messages. However, it's been a while since we've come across music-centric devices like Sony Ericsson’s popular Walkman series. So it’s interesting to see homegrown manufacturer Celkon teaming up with music maestro A.R. Rahman to launch smartphones in the Rahman Ishq range, preloaded with his hit songs and offering good sound output. We got a chance to review the Celkon AR45 and here’s our take on the real-life performance of the smartphone.