Motorola Mobility generated 28 percent of its revenue from selling mobile phones on Verizon Wireless in 2010, underlining the importance of the carrier to the phone maker.
Analysts have warned that with the launch of iPhone 4 on Verizon Wireless, the sales of Android devices on the carrier's network will be cannibalised.
According to Bloomberg, in a regulatory filing made by Motorola, it was revealed that the company drew 28 percent of its revenue from Verizon Wireless.
“The loss of, or a significant reduction in revenue from, one or more of these customers could have a negative impact on our business,” the company wrote in the filing.
The figure was 17 percent in 2009 and 8 percent back in 2009. Motorola's popular Android based Droid series smartphones have catapulted the company to a stronger market position, which now seems in jeopardy with the coming of the mighty iPhone 4 on Verizon.
Sources claim that the CDMA iPhone 4 on Verizon has failed to meet the sales expectations of both Apple and Verizon, though it was also reported that 30 percent of Verizon iPhone buyers had switched from using Android to Apple's handset.
Verizon say the company is pleased with initial sales and official sales figures for the Verizon iPhone 4 are yet to be released.