Android device manufacturer are busy upgrading existing devices with Android 4.0 ICS. As a result, Android 4.1 Jelly Bean update from manufacturers cannot be expected in near future. But, folks behind the popular custom ROM CyanogenMod have teased the latest Android operating system running on an Android smartphone, hinting that Jelly Bean custom ROMs are coming really very soon.

CyanogenMod developer Ricardo Cerqueria posted on Google+ demo video of CM10, which is based on Android 4.1 Jelly Bean, running on LG Optimus 4X HD smartphone.

"CM10 hardware integration is progressing nicely," Cerqueria said. "The point of the preview isn't as much the specific device, I'm just trying to point out that we can actually get CM10 to do things now on devices that aren't named Nexus."

Looking at the video, CyanogenMod 10 works as smooth as butter (not to forget about that Project Butter feature). However, the custom ROM is still in development stage and few features - with Google Now being one of them - are not functional yet. However, the rest of the stuff worked like a charm. Device's camera worked properly and the CyanogenMod folk in the video was able to place a call without any difficulty.

Android device manufacturers - Samsung, Motorola, HTC, Sony - all are yet to make an announcement about when we can expect Android 4.1 Jelly Bean OTA update for existing Android device and which ones will get the update. LG said that the company is so busy in rolling out Android 4.0 Ice Cream Sandwich updates that it has no time to put emphasis on Jelly Bean OS.

A few days ago, Google released Android 4.1 source code in Android Open Source Project (AOSP) tree for downloads. CyanogenMod apparently began its journey in development of CM10 from the same day. Folks at CyanogenMod are clearly making a quick progression as compare to CM9. Much of the work is done, and we will not be surprised if CyanogenMod team uploads the first CM10 Nightly build on its Web site as soon as next month.