jail break nai garnu parcha, 4.2 ko jailbreak release bho hola
http://www.redmondpie.com/jailbreak-ios-4.2.1-iphone-4-3gs-3g-ipad-ipod-touch-with-redsn0w-0.9.6b4-guide/

baaki jailbroken app lai sync kasari garaune ta thaha nai hola, thaha nabhaye ma
http://www.redmondpie.com/appsync-4.2-for-ios-4.2.1-devices-is-now-available-on-cydia/

dhanyabad