Samsung Galaxy S4 User Manual Straight Talk

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Fortunately you can activate a Samsung Galaxy S4 on Straight Talk, there are just a couple things you have to keep in mind first.

You will not get 4g data
You’ll need a microSIM for Straight Talk or a regular size SIM cut to size.
You have to purchase your S4 outrigh
The original default APN must be changed to the following to get MMS and data (reboot the phone after making these edits)
The phone has to be unlocked – an unlocking vendor will be able to help you with this if your phone isn’t already unlocked. You will not have to get the phone unlocked if you get a Straight Talk AT&T sim and have a Galaxy S4 for AT&T.

Here are the Straight Talk Samsung Galaxy S4 APN settings

For AT&T compatible phones:

For T-Mobile compatible phones:

How to change them on Galaxy S4:

Select menu
Select Settings
Select Wireless Controls or Wireless & Network
Select Mobile Networks (under more settings on Jelly Bean)
Select Access Point Names (APN). Delete current APN if possible
Press the menu button
Select new APN
Select Name and enter “Straight Talk” and press OK
Enter the settings above – if they are different from the ones on your activation card, use those settings instead
Select “Save”
Make sure the green radio button is directly to the right of “Straight Talk”
Reboot phone
Your Internet & MMS are now configured

Via: CellPhoneForums