[Galaxy Note5] Straight Talk APN T-Mobile settings

Update:
I created about (4) new APN settings, and now the only APN I have is the default T-Mobile. I add new, but it will not allow me to save any of the APN's I create. I can type in gibberish for the name and APN name, and hit the back arrow, and that APN will be added to the list, with just those two fields I can save it, but as soon as you try to edit, and finish rest of the fields, as soon as you hit "save" the APN disappears. I starting to wonder if I have a bad sim card? I have a reader, but it does not read the newer nano sim cards.

I’ve been using Straight Talk for about five years, floating back and forth between AT&T, and T-Mobile smart phones.
Normally this is easy as pie, and straight fwd. But so far I used about (5) different T-Mobile APN settings for my T-Mobile Galaxy Note 5, and none of them are working.
I bought this phone off eBay, and it was less than I month old (there’s not mark on it anywhere), and it was listed as “Clean ESN”. I’ve bought several phones used via eBay, and ever had an issue. I checked the phone, and it came back clean.
1. Rather than going on ST website, and activating my new phone, and sim card, I call support. The agent took my sim serial number, and activated it. About 30 minutes later I lost network connectivity with my former S4 phone, so I figure the Note 5 was ready to go. I went with a live person, because I was hoping to do (2) things, register the new phone/sim, and get a new phone number, as moved out of state a couple weeks ago, and want a local number. Agent said I would have to wait until Monday, call back to get a new number.
2. I sent a text to a friend, but it didn’t go, after few minutes it would come back with a fail. After retrying I few times it finally went through. I had the same issue, with trying to call. It will have 4 or 5 bars, you make a call, then it will say “mobile network not available”, and then the signal bars turn into an X
3. After creating the first new APN, and restarted the phone, and after boot, I have 4 – 5 bars, but then it will turn into an X. My phone will sit there with 4 – 5 bars for like ever, then when I send a text it it will start losing bars, and the got a X.
4. I’ve created about 4 or 5 new APN’s, and they all do the same thing, once in a while a text will get through. WiFi works great, can surf the net all day.
Samsung Galaxy Note 5 GOLD
32GB 16.01
SM: N920T
T-Mobile

(1)
APN wap.tracfone
AUTH_TYPE None
MMSC http://TF.mmsmvno.com/mms/wapenc
MMS_APN_TYPE default,mms,supl

(2)
Straight Talk T-Mobile service:
Name: straight talk
APN: wap.tracfone
Proxy:
Port: 8080
User Name:
Password:
Server:
MMSC: http://mms.tracfone.com
MMS Proxy: 216.155.165.40
MMS Port: 80
MCC: 310
MNC: 410
Authentication type:
APN type: Not Set, or Internet+MMS Have also used: default,hipri,supl,mms,tfdata
APN Protocol IPv4
APN enable/disable blank