I downgraded my software from 7.1.0.342 to 7.0.0.540 since i read good reviews about battery life in 7.0.0.540. Now when i try to access app world i get error "the data service is not operational"! i could already accessed app world when i was having 7.1.0.342. that time i have upgraded my app world to the latest version. Is there a clash between upgraded app world and 7.0.0.540? ? whats the solution? pls help.
