Microsoft Exchange 2010 Activesync on Android 2.2

So I had this problem with Microsoft Activesync with Android 2.2.1 (Huawei U8800)

The default Email.apk doesn't support Microsoft Exchange 2010 sp1 at all.

So I needed to do this.

1. Download the older Email.apk to /sdcard

2. Do z4root (temporary or permanent)

3. Install ConnectBot

4. Open ConnectBot to get terminal.

5. on terminal:
- su
- cat /proc/mounts
* look for /system partition and device
- mount -o remount,rw -t yaffs2 /dev/block/mmcblk0p12 /system
* on Huawei U8800 it's mmcblk0p12, so replace what's on your device
- busybox cp /system/app/Email.apk /sdcard/Email_old.apk
- busybox cp /sdcard/Email.apk /system/app/Email.apk
- reboot

That's it!

6. Remember! To undo /system rw rights, back to terminal and
- mount -o remount,ro -t yaffs /dev/block/mmcblk0p12 /system
- reboot