Touch and lag issues

[Bains]

I got the SP in exchange for my old SL (MB issue within warranty). It came with 4.3 and i upgraded to the latest version of 4,3. However

1. Screen and touch response is very slow, responding at its own sweet time.
2. Phone hangs for a few seconds while opening apps sometimes.
3. Camera action on lock screen does not work properly.
4. While i plug in the phone with original Sony charger from my SP, the touch input does not work properly, especially when i use keyboard or swype.

This phone is great in terms of battery backup, one reason why i haven't dumped it yet. If anyone has successfully overcome the above difficulties, please inform me. Thanks in advance

[GreekXperiaSp]

these are all known issues to all us the xperiua users...we all hope for the next update if its not Kitkat, to at least repair those problems...for the first problem you have...do you use a screen protector? because sometimes it affects the touch and the sensors if they are hidden...

[Danial-mach1]

1.try reset to factory

2.try reset to factory

3.camera>setting>Quick lunch set it off..then set it lunch only

4.we all have this..for me only appear on 70% after disconnect and connect charger it will answer then

[Bains]

@greekxperiasp- i have a screen lamination... Tried it for the first time instead of a conventional screen guard. Will post after getting a conventional guard
the lag issue was not present in my SL...so I'm trying out with an external microsd to boost it's memory, cause that's the only rational rain i find in drop off performance

@Danial- the keyboard works great with a Samsung charger, i.e,one not fed by the usb cable...

[Bains]

*rational reason, not rain

[Danial-mach1]

it must because amperage that cable can transfer and magnetic\capative field that a cable can make

 "boost memory by external sd card" what do you mean??

[Bains]

Increase the size of memory available... SL had 32, SP has 8