Installation
This rom is for new basebands (v20) only
If you have a firmware version 2.3.3, then you have new baseband
If you have a firmware version 2.2.2, then you have old baseband.
PREREQUISITES
Back up your contents of the sd card to PC
Install new baseband (v20)
Root your phone
Install a recovery (Amonra or CMW)
Hold down VOL DOWN + HOME + POWER keys to enter recovery
Partition sdcard: swap-size: 64MB, Ext2-size: 300MB, Continue partitioning, SD:ext2 to ext3
Enable USB-MS toggle: Copy ROM.zip and GAPPS.zip
Wait 1 minute after copies completed (mandatory)
Disable USB-MS
Skip to the Installation rom via recovery section
INSTALLATION ROM VIA RECOVERY
Hold down VOL DOWN + HOME + POWER keys to enter recovery
Make a nandroid back up
Make full wipe (except wipe sdcard) for the first time installation
Flash from ZIP: Select ROM and reboot
Flash GAPPS and reboot
Install LINK2SD from GPlay, select ext3 and reboot
Open Link2SD: Select AutoLink from Preferences