Share your experience!
I still got some mix but important queries.
How to completely exit whatsapp and also stop it service? It eats a lot of battery. At night while sleeping I want to completey shut it down. So please advice.
I tried setting data limit and a red exclamation icon appear on the top. Now when I disabled it, its still showing the red exclamation icon. How to completely disabled data limit?
Also xperia doesnt show any 2g/3g icon and I want my phone to only use 3G network so how shall I do that?
And is there any app to display/show continuous ram/mem usage on homescreen or status bar at top?
1)To completely stop whatsapp is just pressing "Force Stop" found in the "Apps" in Settings or manually forcing stop it in the "Running" section of Apps in Settings.
2)It does not show any 3G/2G icon unless you connect to a mobile network and an established connection was made.If you want to use 3G only, go to Settings > More .. > Mobile Networks > Network Mode > Change to "WCDMA Only"
3)There are lots of app that could show running background apps in the Play Store and have widgets but those apps would rather use up your RAM continuously instead. One that i think can be used is Greenify.
4)To remove the red exclamation icon,just swipe it and it will be gone forever.
1 just what I thought. But can we have shortcut cerated on desktop to simply stop it? Any app to do that?
2 I think I should choose only WCDMA as Z3 gives more standby and talktime on WCDMA.
3 ok i wont use any ram eaters
4 already figured it out
5 thanks
1)Sadly no.If you use an app to stop it,its possible but it would be the same as 4)
Hahahahah
6)your welcome and happy new year!!! 
Happy new year to you as well..:smileyhappy:
Still some more queries....
1] What is image enhancement in display settings? Does it optimize display or captured images? Does it eat up battery?
2] I have always used nokia so xperia cam settings are confusing for me. There are 2 modes--auto and manual. Isnt there any specific mode to capture images at Night or pitch dark environment and also Close up images like of a flower or tiny insect?
Tomorrow I'm going out for tour so I need to capture images from my moving car so in which mode pr what setting is perfect to capture them/ moving objects??
3] Xperia uses Shattered proof glass so what exactly is that? Hows it compared to Gorilla glass? Isnt shattered proof also scratch proof as well? If so then why is it so delicate that users have their xperia displays cracked from front and back?
4] And which power saving mode allows limited datan transfer?
5] I want to disable some apps on starup so suggest me a descent boot/starup manager which is low on resources and does the job pretty well.
@uliwooly thanks for that link.
@Ashroft98
Thanks mate to promptly answer my queries. Really appreciate your efforts.
No matter Z1 or Z3 they both are from the same families. :smileysmileywink:
If I call and sms often my battery doesnt drain but as soon as I turn on whatsapp for an hour my battery drains by 4-6%. Is this a normal behaviour?
I have set Restrict background data incl store and chrome. But its still not helping.
Also my Used ram is always 980mb to 1.1gb and left with 590mb free of the overall 2gb. 
I dont have any gadget on homescreen but just meare 4-5 basic shorcuts. No live wallpapers. No BT,wifi,gps,location etc. turned on.
I'm on wcdma pref/gsm mode though. Data is turned on manually as and when I need it.
Actually my main concern is how to get 2 days battery life as promised by Sony.
Based on what and how much usage did they calculated 2 days. If anybody can tell me I will follow the same and reply.
Anytime
@Ashroft98
I returned from my tour & Xperia captured some fantastic shots: smileysmileythumbsup: Thanks for your tips.
But I still have some imp. things to worry about........
1] Yesterday I charged full battery and instantly turned On Low battery mode & Stamina mode and also Aerplane mode thus no calls/data/sms/wifi/gps etc. usage.
Thus the cell was only used for capturing images @ default 8MP and some at 15-20MP manual. 85% images were shot in daylight with flash off and the rest 15% at night with auto flash. In all I captured 330 images incl. some videos.
And end of the day my battery stands at 14%.
Hows this benchmark? Is this pretty low as compared to a normal Z3 Compact performance?? smileyraised_eyebrow:
2] Another major concern is, Ram in use is always 990mb or 1.1gb and left with 590mb free of the overall 2gb. 
Why is this happening? I dont have any 3rd party apps installed apart from whatsapp for which as well I have turned on Restrict background data. Also did Restrict background data to many other apps like google play/service/ fb/chrome and whatever I dont use. Still same result of 1gb+ ram usage. 
I dont have any gadget on homescreen but just mere 4-5 basic shortcuts. No live wallpapers. No BT,wifi,gps,location etc. turned on.
I'm on wcdma pref/gsm mode though. Data is turned on manually as and when I need it.
So even if i check my Battery usage stats, Screen is always using 41-47% battery even though the brightness is 40% with no animated or live wallpapers/no widget or cluttered homescreen. 
3] If I call and sms often my battery doesnt drain but as soon as I turn on whatsapp for an hour my battery drains by 4-6%/hr rate. Is this a normal behavior?
4] Actually my main concern is how to get 2 days battery life as promised by Sony. Based on what and how much usage did they calculated 2 days.
5] Even worst. Just full charged the battery and now :smileyshame_on_you::smileyskull:the estimated battery life shown is mere 6 hours? How the **bleep** on earth can this be possible on any phone???
Also now the battery is dicharging very fast like 8% in an hours time even if you listen to music without any mobiledata activity.