In order to get JellyBean 4.1, all 501 users need to visit service center but here you can download the Official firmware on your PC and flash it directly on your Lava phone sitting at home. Lava Iris 501 has recently got a new firmware update. This update will install Jellybean 4.1 OS on the device.
Now this update is not send through OTA. You will have to visit LAVA Service center to get the firmware. There is one more way to install it. You can go ahead with manual process. From here you can download the official update and you can install through SP Flash Tool. It is easy and will help you to have the new and latest feature of Jellybean update on Lava Iris 501. You have to install Media Tek Driver also in your system for install this Rom. There is a short guide available for the same that you can refer.
After downloading the firmware on your PC, follow the step by step Guide provided at out Forums for flashing the firmware and update your Lava Iris 501 to this JellyBean version. If you have any comments or question, leave comment below.