You sure it said "Loading boot ROM failed" ?
It must have encountered an issue when installing, since it's an ROM App upgrade.
Let me explain you everything from very first moment. I installed the SIS files of the update provided by
Abdoul Ghany Hamameh. After that I restarted my phone for the update to take effect. Phone restarted normally. I used the new features in gallery like
Mark and send via Bluetooth and I was about to connect my phone to charger, "Battery empty" message was shown and the phone switched off. I connected it to charger and the phone took almost 10 minutes to boot up completely and "
Loading boot ROM failed" was shown before complete boot up. It was running too slow. I opened the
File manager and there I noticed that when I clicked
E: drive i.e. mass memory,
"Memory in use" was shown though the phone wasn't connected to my PC via Bluetooth or via USB. I tried normal and dead phone flashing using Phoenix but normal flashing (refurbish) didn't work and in dead phone flashing mode, Phoenix couldn't detect my phone, it failed. Today I took it to Nokia Care, they flashed it using Nokia care Suite but still it was "AS IT IS". They opened it and noticed that it's a HW problem. So they decided to send it to
Nokia India Headquarters for further repairing. I'm gonna miss my phone