CNN 's Umika Pidaparthy contributed to this report . A power outage this week sparked some controversy among BlackBerry customers . Apple faces competitive pressure , most recently from the iPhone 4S . BlackBerry addicts are forced to ditch their longtime drug of choice .
A power outage this week sparked some controversy among BlackBerry customers . Apple faces competitive pressure , most recently from the iPhone 4S . BlackBerry addicts are forced to ditch their longtime drug of choice .