Digital Trends – In a study conducted earlier this week by research firm Localytics, nearly 37 percent of all Android smartphones are now 4G-enabled. While the term 4G is still a loose description of faster data speeds beyond 3G capable phones, the research firm defined LTE, WiMAX, or HSPA+ capable phones as being 4G-enabled. The top three smartphones driving this growth of 4G adoption include the HTC Thunderbolt on Verizon, the HTC Evo 4G on Sprint and the Samsung Droid Charge on Verizon. Other contributing smartphones include the Sprint Epic 4G, HTC myTouch 4G on t-Mobile, Motorola Atrix on AT&T, EVO Shift 4G on Sprint, Samsung Galaxy S 4G on T-Mobile, HTC EVO 3D on Sprint and LG Revolution on Verizon.