No "General" tab on settings of my iphone 4S
I have a problem upgrading software of my iPhone 4S, Model A1387 (printed on back cover of phone).
Under settings, the interface does not show "General" tab" and I can't find "Version" tab as well and I don't know what operating system is being used.
In Phone Settings, it is showing Model no. MC318LL.
I am new to iPhone and need help to upgrade the software and and get a General tab on the Settings tab.
Your help will be much appreciated.
Thank you.
iPhone 4S