Today I went to the store and asked for a new SIM, and I asked them why did my SIM got fried. The answer was simple: Was your phone using the 3G+/4G connection? YES, it's always connected! Well that's why your SIM burned out, you have a standard SIM not a USIM (3G+) card, and it got overloaded and it burned out, and this is because the SIM card you were using was not designed to take that much stress.

So now I bought a Micro USIM 3G+ (for a very good price, with a extra 1GB 3G+ internet traffic) and now I have warranty for it .