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MMS, LTE, and APN problems

cbsewell
I'm a contributor level 2
I'm a contributor level 2

I purchased a new unlocked android phone and transferred my SIM card to it from my old phone to it. The new phone is an upgraded model of the old and supports all the same bands as the old one.  However, I am having problems getting on the LTE network, which my new phone definitely supports.  The APN list is completely different than what it was on my previous phone and I have no idea how to change it.  I can manually select the ltemobile.apn to force 4G, but then I cannot send or receive MMS messages, and the phone switches back to 3G to make phone calls.

 

Here is what the APN list looked like when my SIM card was in the old phone. Everything worked fine.

Screenshot_20190102-071606.png

 

Here is what the APN list looks like when I put the SIM card in the new phone:

Screenshot_20190102-072031.png

 

This is Oreo 8.1 so I can't edit, add, or change any of the APNs.

 

Now when I had my SIM card in the original phone, it didn't start out looking like the first APN list. It looked like the APN list in the new phone, and I had exactly the same problem. But I don't know when it changed to the new list of APN's or what I did to get it to change.  Is this something that changes on it's own eventually or is there something I can do to speed up the process?

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