U could get an app for facebook
Chat with our AI personalities
From what i read about Facebook's latest update you probably tried downloading an app not compatible with your iphone3. I suggest you post your question on your current Facebook page.
There are many apps that you can choose from that will work on your iPhone 3G. These include Opera Mini, Google Translate, Optime Games, and Touch4.
Probably because in your settings you diidnt turn on enable 3G or it's broke .and you need a new iPhone .
Inactive USIM Means That Your Sim Needs Activating Log On To The 3g Site And Activate It!
By using an airtel 3g mobile