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iPhone 4s (6.1.3,bought used didn't restore it,cause didn't know if it is necessary and also didn't know how to,read below you will get my point)

and my device configuration goes as follows

Apps = 47 (,fb,viber,tango,messanger,soundcloud,espn cricinfo app,notes app from itunes,chrome,download manager,fileapp,Open office,Adobe reader,vlc,songza etc)

Benchmarking tool: Battery app from itunes store


Push notifications for:

Mail app: 2 accounts on push,1 on fetch (minutes)

Facebook messenger

Whatsapp

Espn Cricinfo app (live cricket score,though not so reliable push)

Tapatalk: 3 forums

Weather widget (lol :p)

First the GENERAL LAG: I get sort of "low-framerate" type of lag while scrolling lists in adobe reader,in settings aswell at times,and in other apps with long lists or rich

content,strangely no lag USually on safari,where it had to be,the only lag in safari is usually due to my weak connection where website is just loading and i tend to scroll down

Kindly help me with this it really frusterates me,I bought this idevice (my first any-smart device) just for its efficiceny and this drives me crazy,i

ditched android ONLY for this


NOW: the Memory management issues and the resultant lag in heavy tasking apps/safari while multitasking


When my device has no apps in switcher,whenever i check the memory status from battery app,it is above 50%...usually 50-68%...I don't know if this is normal or what,but fine

for me..but as i open music and say,notes and fb messenger/songza/ etc. or even a low memory app (whatsapp etc) and check the battery app,the memory usage is 85-94% and here the lag creeps up a bit if i type longer in notes etc,and sometimes if i open 8-9 apps,it works for few minutes ,and then phone resprings..


THe Strange bit is whenever i click free up memory,the memory usage goes back down to 74% or so..making everything quite slick

typing in open office is Impossible for the kind of lag i get,songza + open office = impossible...typing gets stuttering and all,don't know what to do..


as now i have jailbroken my device the memory issue crept up more,but i have deleted the apps and now it is less annoying (less than the tweaks applied,not the above mentioned frusterations :p)

Kindly help needed????

any solid suggestions? causes??? any more info you need i am ready to tell but i really want to make my device efficient,and want to use it jailbroken?

do i need a restore? if yes,then can i restore to the same firmware (6.1.3) (NOTE: i have jailbroken it)...even if no? then how do i restore?