The study also revealed that APAC region had the most number of smartphone customers who do not know how to use the advanced features of the device.

"The survey confirms that smartphone support calls are increasing rapidly, caused by the dramatic increase in number of devices, features, and services," said Ari Banerjee, senior analyst at Heavy Reading, an analyst firm that conducted the study for Amdocs.

Banerjee added that adding more call center staff is not the solution. Rather, customer care managers should focus on efficiently managing these support calls and possibly even consider automating the process and even outsourcing.

Amdocs, which offers customer experience systems, also suggested that service providers use "effective and efficient customer management technologies to ensure better lifecycle management and maximise the potential revenue opportunities associated with smartphones."

The study conducted in November and December 2010 involved 77 IT and marketing professionals from 55 wireless service providers worldwide.