Something VERY VERY weird happen to my phone the other night.
Rather my SIM (Airtel.. my phone is locked with Vodafone)

So, I just finished talking on the phone, and I turned off the screen.
About 2 minutes later, I wanted to make another call, and I realised a "No Service".
So, I restarted the phone. I had 1 bar, and no Carrier Logo this time.

I was stumped.

I removed the Airtel SIM Card along with the VirginSIM, and put my original Vodafone back in. It worked, I had network.

So, I put the VirginSIM and Airtel back in, and again 1 bar, no carrier name.
I tried the SIM alone in another phone (LG something or the other that my sister uses). Nada, no signal at all.

I immediately called my friend whos on Airtel and in my area, and his phone was working.

The entire night and next day the Airtel SIM Card didnt work for me. That night, I popped it back in with the VirginSIM and voila, it started working again?..

I dont get what happened....

Either the Tower near my area was down for an unusually long time (and my friend got reception from another tower), or my Airtel SIM card died for a while?