For some reason my phone is not reading the sim card. This happened 2 days ago after I did the 2.3.6 ota. Took it to verizon, and it worked fine. Now its giving me the same error. The sim card is in the phone, but the phone is showing that the sim card has been removed. This error does not allow me to use any data on the phone at all or make calls. I'm going back to verizon tonight to get this looked at again. Last time I was at verizon when this first happened they said they may have to replace my phone. I'll keep this post updated.