I just switched phones and cannot receive new texts. However on my old phone while its connected to wifi it still receives texts. Old sim card is in new phone and it is connected to network.
Did you purchase your new device from T-Mobile? What was your old device and what is your new device? Double check the APN Settings on your new device. https://www.t-mobile.com/support/devices/not-sold-by-t-mobile/byod-t-mobile-data-and-apn-settings
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