Hmm..there are a couple of things that may factor into not being able to receive regular texts (not iOS). Are you able to make/receive calls while not connected to WiFi?
Go to Settings > Cellular > LTE > Make sure Cellular Data is enabled > Select Cellular Data Options > Enable LTE > Voice and Data.
Give that a shot and let me know if that works for you.
Just wanted to check in with you to see if you were still having issue with your text messages. Let us know
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