How to change carrier on iPad 2nd generation? I have a 2nd generation iPad which has both WiFi and Cellular connection. It is an iPad that I was using during a few years that I was living in Japan and has a Japanese phone company cellular connection.

Even when the iPad was reset, this specific connection would show up in settings. How can I set up the iPad to use in United States, with a US cellular connection?
If you check the Apple Sim page for iPad here (Use Apple SIM with Wi-Fi + Cellular models of iPad), it says that you can use a nano-SIM card in the SIM tray to set up a cellular data plan with a different carrier.


  Japan: 
  
  
  AU, DoCoMo, Softbank (purchased in a carrier retail location): The    embedded Apple SIM and nano-SIM tray are locked to the carrier that
  sold you your iPad. Outside Japan, you can use the embedded Apple SIM 
  or a nano-SIM card in the SIM tray to set up a cellular data plan
  with a different carrier if you are outside Japan..
  KDDI (KDDI retail locations): The embedded Apple SIM is locked to    KDDI in Japan. The nano-SIM tray is locked to the carrier that sold
  you your iPad. Outside Japan, you can use the embedded Apple SIM or a 
  nano-SIM card in the SIM tray to set up a cellular data plan with a
  different carrier.