If you recently purchased the new and shiny 16GB iPhone, and you are in the habit of changing SIM cards, next the following is just for you. Apple has released a doc about swapping the SIM cards whether after such operation your iPhone didn’t work.

Basically you need to reconnect your iPhone to iTunes. iPhone keeps a record of previously inserted SIM cards,

but whether the carrier name of your SIM does not show up in the status bar after you have changed the SIM you will need to reconnect iPhone to iTunes.

So remember for the next moment that whether you do not connect iPhone to iTunes after changing or reinserting the SIM, iPhone may not work as expected.

Original post by Lika Todadze