x8 runs on android 2.1 eclair. no longer 1.6. it is upgradable. but as a x8 user. the only problem i found was its poor battery life. the camera quality isnt that good. it has no auto focus. the pages on internet it tiny. the touch screen not that responsive on some touch and too responsive on others. no flash player. no multitouch. speaker quality lousy. keypad (seriously, is anybody's fingers that tiny?) being a 2.1, all the apps as installed on the internal memory since google doesnt want pirated apps. WTH with that. and since apps installed on internal memory, it eats alot of phone memory, hence the phone lags alot. ALOT. and SE says the max you can upgrade is 2.1 and not compatible with 2.2 since it has hardware issues. WTF?! is SE pms-ing around with all its users? seriously, does SE want its fan base to decline so much that everybody who wants an android would prefer htc? gawd.....