This is a quite bad quality photo (complression, cromatic aberration)... You filled the frame well with crowd, but hardly any cell phone to be seen here. The girl looking here with black hair could be put to a rule-of-thirds point. She should hold the mobile and you could crop a bit tighter as well.
You're title should have been It's the network not can you hear me now? At first look I didn't see anyone on a cell phone at all but after looking at it for 3+ minutes I found a guy. There is just too much going on here to get the effect that you really wanted. Sorry but that is JMO