how to find various details of your phone
Go to Settings > General > About
there you will find out the various details like
serial number of your iPhone,
IMEI number
Modem firmware of your iphone or Baseband of your iPhone
software Version of your iphone
Capacity of your iDevice
How to Turn on the Battery Percentage of your iDevice
Go to Setting > General > Usage
then scroll down and turn on the battery Percentage option…
how to Change the voice of Siri
Go to Setting > General > Siri
there if your siri is off then Turn it on.
and then to change the voice of Siri, go to Language option and then change to USA version or UK or Auss version.
in this case only UK version of siri is of a man.
How to take snapshot on your iDevice.
if you see somthing and then want to take a picture or snapshot of it
then
Press Sleep/Wake button alongwith the Home button, it will take the snapshot and this will be stored in the Photos section.
how to Reset iDevice Home screen layout.
Go to Setting > General >Reset
there click on RESET HOME SCREEN LAYOUT to change it back to the way apple would have done it.