Galaxy S4 APN default settings due to MMS issues

I was initially using jellybean on Samsung Galaxy S 4 and for a while was sending and receiving MMS with no issue. I can still send MMS without issue and but I was still having issues receiving MMS. I was advised byTmobile to upgrade to KitKat. Still experienced issues receiving MMS. Tried turning Wifi on and off. Under Wi-Fi Calling, Cellular Preferred is on. Tried setting APN settings to default. None of that worked but what ultimately allowed a message to get through was changing my default APN settings. I was unable to make changes directly in the default, so I manually created a new one and followed the guidelines listed:

To set the internet, picture messaging (MMS), and access point name (APN) settings, follow these steps:

Android phones

Note:
On Android phones you can reset the default APN settings for data and picture messaging (MMS).
In the event that you need to manually set the APN, follow these steps:

Note:Settings
for the T-Mobile myTouch 3G, myTouch 3G Slide, myTouch 4G, and myTouch 4G Slide
can be found here: Data & picture messaging settings: T-Mobile myTouch 3G / 3G Slide /
4G / 4G Slide.

1. Touch Settings.
2. Touch Wireless
   & networks.
   Note: This varies by software
   version and phone.
   • Android 1.6: Wireless
     Controls.
   • Garminfone: Wireless
     Manager.
   • Behold II: Phone
     Information.
   • Android 4.1 (Samsung): Connections
     tab then tap More networks.
3. Touch Mobile
   Networks.
4. Touch Access
   Point Names
   or APNs.
5. If there is a T-Mobile
   APN, touch it. If not, press the Menu
   key, and touch New APN.
6. Enter the following settings for the Data
   APN:
   • Name:
     T-Mobile
   • APN:
     epc.tmobile.com or fast.t-mobile.com (for LTE devices)
   • Proxy:
     <Not set>
   • Port:
     <Not set>
   • Username:
     <Not set>
   • Password:
     <Not set>
   • Server:
     <Not set>
   • MMSC:
     http://mms.msg.eng.t-mobile.com/mms/wapenc
   • MMS proxy:
     <Not set>
   • MMS port:
     <Not set>
   • MMS protocol:
     WAP 2.0
   • MCC:
     310
   • MNC:
     260
   • Authentication type:<Not
     set>
   • APN type:
     <Not Set> OR Internet+MMS
     (depending on software version)
7. Press the Menukey.
8. Touch Save.
9. In the list of APNs, delete all others that
   may appear. If there is a FOTA APN,
   you may leave that one. To do this:
   1. Touch the APN you want to delete.
   2. Press the Menukey.
   3. Touch
      Delete APN.
10. Verify that there is a circle next to the
    one remaining APN to show it is activated.

Under the APN type, I first tried <Not Set>, which did not work but Internet+MMS did work and I finally received a picture after saving out of my newly created APN. However, the green dot keeps going back to the default APN when I'm in APN section or nowhere near it. I tried to delete the default APN but everytime I click on it and then press the menu button to delete, the only option I'm given is reset it to default. I just want to be able to receive pictures so if there is no way to delete the default, how else can I go about receiving pictures?