Never underestimate the importance of having a microphone, Sound accounts for 50% of the overall professional 'look' of your videos so it's well worth investing in a quality mic. Internal 'in build' microphones on mobile phones or smart devices aren't great and can often leave your audio sounding echoey or tinny. So, it's best to purchase an external microphone. *Always check that the microphone you’re purchasing has the correct adapter for your phone. You might need to purchase an additional adapter.