iOS 4.2.1

iOS 4.2.1, jb @ 15/02/2011

it's a holiday today... coincidentally, some free time to upgrade my iOS (finally)~ am happily using v4.1 but jz feeling a lil' adventurous today ヾ｜￣ー￣｜ﾉ

if you've read my previous iOS upgrade post, there are some changes this time... similar but not entirely the same

steps to upgrade from v4.1 to v4.2.1
1. upgrade itunes, older itunes might not work with iOS4.2.1
2. download the required OS ipsw from here
* locate for iPhone4: iPhone3,1_4.2.1_8C148_Restore.ipsw
3. add a line to C:\Windows\System32\drivers\etc\host and save
74.208.10.249 gs.apple.com
4. open itunes, on the iphone configuration page hold shift + click restore
5. locate and select the downloaded ipsw
6. restore is now in progress
* halfway through, you will get an issue when itunes tries to verify the firmware - phone now goes into dfu mode and itunes fails to proceed with anything else - no worries, that's expected! proceed with the jailbreak process with the iphone still connected

v4.2.1 jailbreak process
1. connect phone to pc
2. download greenpois0n
3. unzip downloaded file contents and run
4. follow onscreen instructions
5. phone will reboot once completed
* it might appears to be hung/frozen, just let the app complete and reboots on its own
6. there should be a "launcher" app, run the it to install cydia
7. install all your favourite cydia apps! below are my selections:

http://apt.thebigboss.org/repofiles/cydia/
>> MultiIconMover
>> SBsettings

http://apt.modmyi.com
>> Apple boot logo (to remove the greenpois0n's skull boot logo)

http://cydia.hackulo.us
>> Installous

http://cydia.xsellize.com
>> KuaiDial (not compatible yet for v4.2.1)
>> GroupSend
>> iPicMyContacts
>> MultiCleaner
>> Infinidock
>> BiteSMS
>> FolderEnhancer (non-repo version not working anymore)

http://repo.insanelyi.com
>> iBooks Fix (a fix for problem reading iBooks on earlier versions of greenpois0n)

things to do with v4.2.1 jailbreak
1. resync previously downloaded apps (if the sync option is unchecked)
2. reconfigure cydia apps
3. activate find my iPhone
4. update facebook/tweeter status (just joking!)