https://community.sony.rs/t5/other-general/stamina-mode-not-working/m-p/3143098#M48275 force stop eco mode controller in settings&gt;apps&gt;all apps and then clear data..switch ur fone off and restarts again...u r done.. Sat, 23 Nov 2013 18:16:30 GMT anuj1989 2013-11-23T18:16:30Z https://community.sony.rs/t5/other-general/stamina-mode-not-working/m-p/3143097#M48274 I just got back my sp after repairing from the service center 2 days back but since then I noticed that stamina mode is not working.the standby time remain same whether it is off or on.and the time is only 13 hours at 100% battery.earlier it used to be 2-3 days.is there any solution to it? Sat, 23 Nov 2013 17:38:02 GMT https://community.sony.rs/t5/other-general/stamina-mode-not-working/m-p/3143097#M48274 ekpreet 2013-11-23T17:38:02Z https://community.sony.rs/t5/other-general/stamina-mode-not-working/m-p/3143098#M48275 force stop eco mode controller in settings&gt;apps&gt;all apps and then clear data..switch ur fone off and restarts again...u r done.. Sat, 23 Nov 2013 18:16:30 GMT https://community.sony.rs/t5/other-general/stamina-mode-not-working/m-p/3143098#M48275 anuj1989 2013-11-23T18:16:30Z https://community.sony.rs/t5/other-general/stamina-mode-not-working/m-p/3143099#M48276 <P>ekpreet,another reason that you might not have a decrease in standby hours after turning Stamina Mode ON is because the apps you use doesn't need mobile data so you literally don't have anything to save battery from.Thats what i know from previous posts.</P> Sat, 23 Nov 2013 19:21:21 GMT https://community.sony.rs/t5/other-general/stamina-mode-not-working/m-p/3143099#M48276 Ashroft98 2013-11-23T19:21:21Z