HELP! Factory reset Note 8, 3G data works but not LTE despite fixing APN settings. (MetroPCS+TMo)

Strange , this will require a person physically look at it , might want take to Samsung experience store to run diagnostic or phone repair center

I'll play around with it and see which configs allow me to use TMobile. I believe what makes it go away is that last part. The Mobile Network Operator Value
 
You might consider reinstalling the firmware using Smart Switch: https://firmwarehome.com/how-to-use-samsung-smart-switch-for-firmware-restore-samsung-devices/. If there's a problem with your current firmware, then a factory reset won't solve it, since it will still use the same copy of the firmware.

I really really really don't want to go through the pain of doing a factory reset again. Gotta move all my internal pics to SD, backup messages, and move some other stuff around
 

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