Most of the midrange /lower midrange mobile phone users are always looking for SOFTWARE UPDATES.
Reality is they don't have knowledge about the limitations of the hardware in their budget devices.
Having latest Software is not worth enough. The performance of the device depends on the having right processor. The processor of your device has some limitations. SOFTWARES keep upgrading to make mobile phones more easy to use & to keep in touch with new technologies. But the processor in our devices is installed according to the prices of device & according to the software available in that time. So you can update ur software but u can't update processor in your device. You have to purchase new device with latest processor. THAT'S WHY IF YOUR PHONE IS RUNNING GOOD, YOU DON'T NEED TO UPDATE TO LATEST SOFTWARE. EVEN THE APPS IN YOUR PHONE DOESN'T NEED TO BE UPDATED UNLESS IT'S NECESSARY.
Watch the Video to have some good knowledge about Updates.......... Link is given in comments section ......