Verizon version may come to U.S. later this month
Citigroup says the phone might cost less than $200
Video performance similar on iPhone 4S on AT&T, Verizon and Sprint, Metrico study finds
Report by iPass also confirms Bring Your Own Device trend in workplaces
Analysts say Amazon's Yap and Apple's Siri could push companies to seek voice apps for workplace
AT&T already said it will add six more LTE cities on Sunday
One Barnes & Noble store had units on sale Tuesday, while Amazon shipped Kindle Fire a day early
G'zOne Ravine 2 is a global phone with GPS apps
In response, Verizon says it complies with laws, has deferred some taxes
Among large businesses, AT&T has a 28% share of Internet traffic
