Following one or more steps listed below will definitely help to speed up your iPhone 4. Apple also underclock iPhone 4 CPU in order to improve the battery life.

2.  Even though iPhone 4 is one of the
fastest iOS device with A4 chip, it tends
to get slower after installing few
applications. This isn‟t something new,
like other devices iPhone 4 is also prone
to sluggish performance/speed.

3.  Apple also underclock iPhone 4 CPU in
order to improve the battery life and few
other reasons.
 Follow the below tips to get the
maximum out of your iOS device.
Following one or more steps listed below
will definitely help to speed up your
iPhone 4.

4.  Jailbreaking: Although
iPhoneJailbreakFAQ.com is a blog
dedicated to iPhone jailbreak, we still urge
people to not to jailbreak their iOS device
unnecessarily if they are not fond of using
jailbreak apps.
 There are plenty of reasons to jailbreak iOS
device, but not all the users needs it (recent
survey in China revealed that only 33%
people are jailbreaking their devices).

5.  There are tons of useful applications
available on cydia which can make your
experience much better than the normal
users. But trying out each and every apps
available on Cydia is not advisable. Unlike
Apple, Cydia doesn‟t scrutinize each and
every submitted apps. You should only
download the application from the trusted
source. Installing untrusted cydia apps is the
number one reason for bad user
experience.

7.  There are many sources available to
download and install cracked apps.
Installous, sinful are one of the few repo
available on cydia which lets you
download cracked apps. It is not
recommended to try cracked apps on
your iPhone 4 as there is no guarantee
that it will work well on your device.

9.  Text messages: Delete unwanted old
SMS. Leaving as much free space as you
can is always a good choice.
 Optimize Safari: Once in a while
delete/clear cache, cookies, history of
Safari browser.

11.  If you‟re tired of slow iPhone
performance, then perform a „Hard
Reset‟ (Hold both Home+Power button
until it shuts off..ignore “Slide to Power
Off” notice..keep holding it until Apple
logo appears and your iPhone reboots).
Double Hard Reset helps a lot to gain
significant speed improvement in iPhone
3G.

13.  We‟ve already reviewed iOverclock and
Speed Intensifier cydia tweaks to
overclock iOS device (it is not overclock
in actual sense). Apple keep iPhone 4
CPU underclocked to increase the
battery life. Speed Intensifier cydia tweak
helps in over coming this restriction. It
also provides plenty of other options

15.  Do let us know if the above steps has
helped you to speed up your iPhone 4
(above steps are also applicable to
other iOS devices). Have we missed
something? Let us know your view via
comments section.
 That‟s it for now!!!

16.  http://geniusgeeks.com