Android Jelly Bean 4.1.2 XXLS7 Modem XXLS3

How to install Android Jelly Bean 4.1.2 XXLS7 Modem XXLS3? It's missing from the leaked stock XXLS7...

Download Modem XXLS3 here. XXLS3 modem flash-able via CWM Recovery. Phone's cellular radio and its supposed to give you better reception.

Add-on.
Tested. You could run Jelly Bean Keyboard 4.2. Download Jelly Bean 4.2 Keyboard APK here

How to change modem to I9000ZSJPG

Some people said I9000ZSJPG consume good battery. Let's try. Because some modem handle good wifi and 3G connection. Previously I'm using XXJVR that come with the stock.

Download modem here

TODO:
1. Copy "Modem_ZSJPG-CWM3.zip" to your SD card folder "mnt/sdcard"
2. Reboot recovery
3. Select Install ZIP file
4. DONE

Note: Usually I'm clearing Dalvik and Cache after that. Just to make sure I'm clean. but do NOT factory reset

Check out your baseband. It's ZSJPG now. Let's see how's it consume battery ... as we know battery mostly consume by Display and WIFI.

Note: 
ZS is letter code for China and Hong Kong
XX: Austria, Belgium, France, Germany, Hungary, Italy, Spain, United Kingdom