Iphone 4 carrier not available
Hello,
My iPhone 4 was working fine and I don't had slide up menu for that I update the phone to iOS 7.1.2, once the update installed to my iPhone 4 I lost my carrier.
I checked for carrier updates but none available, connected to iTunes but nothing happened, no new updates are available. I reset my iPhone's networks setting and 2 time reset all setting but still it not giving me any clue.
I am sharing the screenshot for better understanding:
https://www.dropbox.com/s/s4auzx4p8a7iyuh/IMG_0001.PNG?dl=0
What should I do ? require help!
Best Regards,
iTunes ID