How to upgrade iPhone program

for the user iPhone everyone please know
for mobile phone iPhone there is full efficiency usability we have will to have something upgrade control program of iPhone also which we can upgrade change website way of Apple.com get like the equipment is other of Apple neither be iPod, iPod Nano, iPod Touch etc.

the equipment that have to have in something upgrade program
-the computer which use the operating system Windows or Mac OS
-late Cable for link up iPhone with USB Port
-program iTunes version new be late download done to a turn www.apple.com/itunes
-iPhone

how to upgrade iPhone
1. build late USB between the computer with iPhone
2. program iTunes open automatic if do not open give switch off the bill click the icon iTunes
3. heading Devices left hand side click choose your iPhone
4. the next time differ in the middle will see a button "Check for Update"
5. click Download and Install