Here is the Most completed list of Samsung Galaxy APN settings for the United States cell phone carriers. I sorted The US Cell Phone Carriers in alphabetical order. So, You can find your cell phone carrier easily.
APN is an abbreviation for the Access Point Name, Your Samsung Phone (or Tablet with SIM card support) needs the APN Settings to connect to the mobile data (Internet and MMS). This Guide will show you how you can Check, Setup, And Reset APN Settings on your Samsung Phone.