Being able to use LTE is a must. We are here to help Akc713. With regards to Apple Configurator, this is a specific function that is handled directly through Apple. You must work with Apple with regards to this App. You can reach out to Apple directly here: http://spr.ly/6583DfKwb

We do appreciate everything that you have tried with replacing the SIM card, resetting the Network Settings including restoring your device. Have you tried to restore your phone and set up as new without putting your information back on the phone?

Alberto_VZW
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