By Josh Ong

Published: 08:40 PM EST (05:40 PM PST)

More than half of Verizon's current Android and Blackberry users indicated they are likely to switch to the iPhone when it arrives on the Verizon network on Feb. 10, according to a new survey.

Online sample company uSamp, which conducted a "highly profiled online panel" of more than 700 smartphone users in late January, published the results Thursday. The survey found that 54 percent of respondents who have an Android or BlackBerry smartphone on Verizon are either very likely (25 percent) or somewhat likely (29 percent) to purchase the Verizon iPhone when it arrives next week.

The report could signal particularly grim news for Research in Motion, as BlackBerry users demonstrated higher interest in switching to the iPhone, with 66 percent indicating a probable switch, compared to 44 percent of Android users. RIM's BlackBerry has lost significant share on Verizon as the carrier has heavily promoted its Android offerings. With the arrival of the iPhone, the BlackBerry on Verizon has been relegated to third place.

Also of note, 26 percent of AT&T customers reported plans to purchase the Verizon iPhone on launch day. A larger survey from ChangeWave in January found that 16 percent of AT&T users were planning to switch, though 26 percent of AT&T iPhone users said they would change to Verizon.

For AT&T users intending to jumping ship, dropped calls were the main reason for leaving, with 48 percent of AT&T customers who plan to buy the Verizon iPhone citing dropped calls as the cause.

When the first reviews of the Verizon iPhone emerged Wednesday, reviewers indicated that the Verizon iPhone drops significantly less calls than the AT&T iPhone.

uSamp's survey also found that men are more likely to switch to the Verizon iPhone: 32 percent of males compared to 20 percent of females. As expected, younger respondents indicated they were more willing to wait in line on launch day, as well as more likely to switch overall. According to the report, among Verizon BlackBerry and Android smartphone owners, 71 percent of respondents aged 18-24 and 60 percent of those aged 25-34 are planning to switch.

uSamp reports a 3.6 percent margin of error for their results.

Apple and Verizon will begin selling the CDMA iPhone 4 at 7 a.m. on Feb. 10, though preorders for the device began on Thursday.