Now new editors are behind us : Be carefulI have submitted answer to this post in AE section:
Question: How to update Sony Xperia C smart phone with Lollipop Android OS?
My answer to this post is as per below:
You have option to update your Sony Xperia C with latest Android OS update 5.0 Lollipop. You can update your handset by using custom ROM.
Steps to update your Sony Xperia C with latest Android OS update 5.0 Lollipop
Download 5.0 Lollipop ROM from link below.
After downloading and extract all 3 parts in same folder on your device.
Now you need one more app to be downloaded on your Sony Xperia C from known as Download ROM Manager from Google Play. Now connect your device to PC with USB and transfer ROM folder to PC. Now switch off your device and start it again in recovery mode with ROM Manager you have downloaded from Play Store. Now go to ROM Manager and select backup/restore. This will back up and save all your data.
Now from Recovery Menu erase complete data from your device. Now go back to come again to Recovery Principal Menu and select Flash ROM from SD Card. Search for ROM.zip file and follow instruction step by step. After successful following and completing steps restart your device and that's it. You have now Android latest OS 5.0 Lollipop on your Sony Xperia C
Please note that rooting device with custom ROM will void your handset warranty. There are also chance that handset software got damaged. So please do it at your own risk.
Mr. Editor has rejected this answer two times saying that there is risk in this method so mention about the risk factor. I have done that also in last two lines. Then he said to do it from Scratch and I told him to delete the answer and within a second the response has been deleted.