The latest research by Ericsson Labs suggests that smartphone users are looking for incremental access and higher downloading speed supported by cutting edge customer support.
Net Promoter Score for the industry is only at 11%, 60% of users face weekly issues with their network, satisfaction of coverage at public transport (bus, metro and trains) is very low (~60%).
There is still a huge gap to close.
See complete report here: http://www.slideshare.net/Ericsson/keeping-smartphone-users-loyal