“On 20 May 2010 the 2.2 (Froyo) SDK was released. On 28 June 2010 an OTA (over the air) update to Android 2.2 build number FRF85B commenced to T-mobile customers with a Google Nexus One phone. Changes included:
General Android OS speed, memory, and performance optimizations
Additional application speed improvements courtesy of JIT implementation
Integration of Chrome’s V8 JavaScript engine into the Browser application
Increased Microsoft Exchange support (security policies, auto-discovery, GAL look-up, calendar synchronization, remote wipe)
Improved application launcher with shortcuts to Phone and Browser applications
USB tethering and WiFi hotspot functionality
Added an option to disable data access over mobile network
Updated Market application with batch and automatic update features
Quick switching between multiple keyboard languages and their dictionaries
Voice dialing and contact sharing over Bluetooth
Support for numeric and alphanumeric passwords
Support for file upload fields in the Browser application
Support for installing applications to the expandable memory
Adobe Flash 10.1 support”
1) Use Pkgbackup from cydia to save your cydia packages, then sync with iTunes (Pkgbackup backs up yur cydia packages list to a contact on your iPhone) 2) Use Chronus from cydia to back up app store (and stock) apps with user data then ssh the contents of /var/mobile/Library/Peferences/Timcapsule to your hard drive 3) Restore to 3.0.1 (set up as new) 4) Re-jailbreak with Redsn0w and the 3.0 ipsw 5) Sync with iTunes 6) Download Chronus and Pkgbackup and openSSH from cydia 7) SSH (or use iPhoneBrowser or Diskaid) the Chronus files you moved to your hard drive back to /var/mobile/Library/Peferences/Timcapsule and restore them with Chronus Run Pkgbackup and restore your cydia packages 9) Reboot phone 10) Apply any other settings that were erased during the restore.
This process has taken my restore/re-jailbreak time from a few hours to around 1/2 to 1 hour and you are starting with a fresh restore of the iPhone OS.
I just copied and pasted this from a post I made elsewhere, between step 3 and 4…take it to apple
Normally it’s only possible to sync media on an iPhone with one computer. If you try to use a second computer you get the warning below that “the iPhone XXX is synced with another iTunes library. Do you want to erase this iPhone and sync with this iTunes library”?
However, I’ve found an easy fix for this. In the instructions below I’ll show how to modify any iTunes Library so it can also be synced with your iPhone. You can then either manually manage your iPhone on a second computer, or sync different data on different machines (E.g. Music at home, Contacts/Calendar at work).
The instructions below use the example of modifying the iTunes library on my home Mac to work with my existing iPhone/PC setup. If your existing library is on a Mac, or both machines are of the same type, then the steps are identical.
Notes
On the PC you can find your iTunes folder in your “My Music” (XP) or “Music” (Vista) directory. On the Mac it is in your Music directory.
For the editing part, I recommend UltraEdit on the PC and a combination of TextExit / HexEdit on the Mac. Any hex editor will do, and you only need to edit files on the second machine.
After completing these steps you will be able to sync your iPhone with both computers, either by normal syncing or choosing one machine to manually manage your music and videos. Unless you also keep your music libraries in sync, I recommend you do not attempt to normal sync the same types of data on both machines.
Backup Your Library
On the machine you want to sync with, backup “iTunes Music Library.xml” and “iTunes Music Library” (Tunes Music Library.itl on PC) to a safe location. These are the files you will be modifying.
1) Find your iTunes Library ID
On the machine your iPhone currently syncs with, open “iTunes Music Library.xml” with a text editor and find the entry between the <string></string> tags, after “Library Persistent ID”. In the example below this is 8B6C633F7DACB74B. Copy this entry exactly to a piece of paper, email, temporary file etc. You can then close this file.
2) Change your Library ID
iTunes stores your library information in two places. An XML file and a binary file. You now need to change the ID in both so they match your other library.
Make sure iTunes is not running.
On the machine you want to sync with open “iTunes Music Library.xml” in a text editor. Again, find the entry between the <string></string> tags after “Library Persistent ID” and copy this entry exactly. This time you can use the clipboard if you wish.
When you have a copy, replace this entry with the one you copied in part 1. Make sure you do not change anything else, and the length of the entry is 16 characters/digits. Save this file and close it.
In the Hex Editor, open “iTunes Music Library” (Tunes Music Library.itl on PC).
Select “Find and Replace” from the Edit menu. Make sure “Hex” matching is selected (not ASCII). In “Find” enter the ID you took a note of in Part 1. In Replace, enter the ID you copied at the start of Part 2. Choose Replace All, there should be one match.
Save this file and close it.
Success!
Start iTunes on the machine you wish to sync with and plug in your iPhone. When you select “Manually manage music and videos” you will no longer be prompted to erase your data, nor will the files on your iPhone be grayed out.
Additional Notes
Previously I’ve found that intentionally corrupting the binary “iTunes Library” file (e.g. replacing it with a text file) would cause iTunes to regenerate it using the XML data. This no longer appears to work for me in iTunes 7.6.1 and the “repaired” file only contains a few songs. This may be because I keep my music on an external drive but I cannot say for sure. Either way, patching the binary file does not take long and removes any chance of later problems.
olongcha: 去年做了一个大胆而冲动的决定，准备放弃现在的所有，决定轰轰烈烈的爱一次。可惜毕竟现实和预想相差太远，恋爱的感觉只象是昙花一现的肥皂泡，有色彩但太容易破碎，不仅在距离上而且在心理上，更是在各自的生活里。结果这个大胆而冲动的感觉只能让自己没有去处又没有归宿。是时候醒醒了。 1 month ago from web
olongcha: 于是，开始慢慢的试探的将心打开，渴望有一个人走进来，说，我懂你的心，遗憾的是，当我们打开自己的时候，却看到了其他所有人紧紧抱着自己，没有人愿意走进来了……
每个人……原来……都不是你看到的那样……其实，我们都一样… 1 month ago from web
olongcha: 土星7月21日离开金牛座代表真爱的第五宫后直到2036年才会回来，从七月底起那些阻挡牛牛找到真爱的障碍都将消失。还没有找到对象的牛儿会在整个八月都觉得充满爱的气息，会有机会结交许多不错的新朋友。 Wahahaha 1 month ago from web
Run Pkgbackup and restore your cydia packages
