Alternative for Kies New firmware upgrade is available. I tried to install it through Kies at least 15 times. But every time, it fails. I am using latest version of Kies on my PC.

I Googled for alternative. I found ODIN for the same. But I am doubtful whether it is reliable.

Please tell me if someone knows reliable way to upgrade firmware without using Kies.
There is no alternative for Kies.

Kies is the only offical way to update Samsung's Android devices.

To unofficially flash/update Samsung devices Odin (for Windows) and Heimdall (for Linux) are the de facto standard. These two a very reliable.