1] Download the iOS firmware (IPSW) from here:
http://www.idownloadblog.com/iphone-downloads/
according to the type of iPhone / iPad that you have.
2] Go to iTunes.
3] Connect your iPhone/ iPad.
4] Switch it off by pressing the power button.
5] Now put the phone in DFU mode by pressing the power and home button simultaneously and when the apple logo arrives on the device's screen let go off the power button while keeping the home button pressed until you see the message in itunes that says that you phone is now in restore mode.
6] Press the restore button in iTunes while keeping the shift key pressed so that you can manually select the option to restore the firmware from your downloaded IPSW in step 1.
7] Your device will now be updated. [Set up as new iPhone for now. Once you have put all your Cydia apps restore from backup.]
8] Download the jailbreak tool Evasi0n from the link provided in step 1.
9] Press jailbreak and follow the easy instructions that you will see on the screen.
10] OPTIONAL STEP: After jailbreaking always remember to use tiny umbrella save SHSH blobs always (so that you can downgrade your iPhone to available jailbreak versions).
11] Go to Cydia and add the source iHacksRepo - http://www.ihacksrepo.com
12] OPTIONAL SOURCES:
BiteYourApple - http://repo.biteyourapple.net/
HackYouriPhone - http://repo.hackyouriphone.org/
iHackStore.com - http://ihackstore.com/repo/
insanelyi Repository - http://repo.insanelyi.com/
xSellize - http://cydia.xsellize.com/
NOTE: hackulo.us is shut down. Hence Installous is also shut down. Don't worry further down you will come to know about its alternatives.
13] SECURING YOUR DEVICE:
Steps for ANTIVIRUS Protection:
1. Open Cydia on your iPhone and look for MobileTerminal (NEW)(source: IHR); install MobileTerminal on your iPhone and restart your iPhone;
2. Open the MobileTerminal terminal window by tapping on its icon
3. Enter "su root" and press return.
4. Input the current default root password "alpine" and press return.
5. Type "passwd" command and press enter.
6. Input a new password and press return. Make sure your new password is safe and easy to remember.
7. Enter the new password again and press return.
8. Exit.
So long, you have secure your jailbroken iPhone by changing its root password.
14] Install SBSettings (or alternatively NCSettings. If you are installing NCSettings, after installing it has to be turned on from settings> notification centre and then you will be able to see it in notifications. Make sure put either SBSettings or NCSettings and not both as they have the same kind of functionality hence; might interfere with each others functions).
15] OPTIONAL:
Install Winterboard (to apply themes and all).
16] Install appsync. To download paid apps for free, instead of installous, we now use vShare or AppCake.
vShare: From the safari browser of your device go to http://v.appvv.com/en/ and follow the simple instructions. Don't be scared of the Chinese language that you will encounter because using vShare is simpler than using Installous.
AppCake: Open iphonecake.com on your PC. Download the required app on your pc. Now you can install the app from your PC using iFunBox.
http://www.idownloadblog.com/iphone-downloads/
according to the type of iPhone / iPad that you have.
2] Go to iTunes.
3] Connect your iPhone/ iPad.
4] Switch it off by pressing the power button.
5] Now put the phone in DFU mode by pressing the power and home button simultaneously and when the apple logo arrives on the device's screen let go off the power button while keeping the home button pressed until you see the message in itunes that says that you phone is now in restore mode.
6] Press the restore button in iTunes while keeping the shift key pressed so that you can manually select the option to restore the firmware from your downloaded IPSW in step 1.
7] Your device will now be updated. [Set up as new iPhone for now. Once you have put all your Cydia apps restore from backup.]
8] Download the jailbreak tool Evasi0n from the link provided in step 1.
9] Press jailbreak and follow the easy instructions that you will see on the screen.
10] OPTIONAL STEP: After jailbreaking always remember to use tiny umbrella save SHSH blobs always (so that you can downgrade your iPhone to available jailbreak versions).
11] Go to Cydia and add the source iHacksRepo - http://www.ihacksrepo.com
12] OPTIONAL SOURCES:
BiteYourApple - http://repo.biteyourapple.net/
HackYouriPhone - http://repo.hackyouriphone.org/
iHackStore.com - http://ihackstore.com/repo/
insanelyi Repository - http://repo.insanelyi.com/
xSellize - http://cydia.xsellize.com/
NOTE: hackulo.us is shut down. Hence Installous is also shut down. Don't worry further down you will come to know about its alternatives.
13] SECURING YOUR DEVICE:
Steps for ANTIVIRUS Protection:
1. Open Cydia on your iPhone and look for MobileTerminal (NEW)(source: IHR); install MobileTerminal on your iPhone and restart your iPhone;
2. Open the MobileTerminal terminal window by tapping on its icon
3. Enter "su root" and press return.
4. Input the current default root password "alpine" and press return.
5. Type "passwd" command and press enter.
6. Input a new password and press return. Make sure your new password is safe and easy to remember.
7. Enter the new password again and press return.
8. Exit.
So long, you have secure your jailbroken iPhone by changing its root password.
14] Install SBSettings (or alternatively NCSettings. If you are installing NCSettings, after installing it has to be turned on from settings> notification centre and then you will be able to see it in notifications. Make sure put either SBSettings or NCSettings and not both as they have the same kind of functionality hence; might interfere with each others functions).
15] OPTIONAL:
Install Winterboard (to apply themes and all).
16] Install appsync. To download paid apps for free, instead of installous, we now use vShare or AppCake.
vShare: From the safari browser of your device go to http://v.appvv.com/en/ and follow the simple instructions. Don't be scared of the Chinese language that you will encounter because using vShare is simpler than using Installous.
AppCake: Open iphonecake.com on your PC. Download the required app on your pc. Now you can install the app from your PC using iFunBox.