I turned off my LG t-mobile phone, when I turned it back on, it said to insert a Sim card.

[AC Question]

I turned off my LG t-mobile phone, when I turned it back on, it said to insert a Sim card. The past couple days when I would go online the pages wouldn't load. I have to refresh at least twice to view the pages. So today I decided to turn my phone off and maybe that would somehow help. Unfortunately, when I turned it back on I had no service. I am able to use wi-fi but unable to send/receive text messages or make calls. Every time I try to do so it says "No USIM card." I have turned off the phone and restarted a few times now and even taken out the SIM card. I have dialed *#*#4636#*#* to try to turn off the radio. But when I try to go to the page where I am supposed to turn off the radio which would be the "phone information" page, I am not able to click on anything because a message pops up saying " This application does not work on this device."