iPhone SE can receive iMessage but can only send text messages
I recently started with T-Mobile and got a new 2020 iPhone SE. Ever since then, I can receive iMessages but I can only send text/SMS messages (green bubble).
When I'm typing, the three dots appear on the receivers phone, but the message only goes through as a text.
I do have "send as SMS" checked so that if iMessage is not available to send as text. When I turn that off, I just get a message that says cannot be delivered.
I used to be on Verizon with an old iPhone SE and never had this problem.
I even have this problem when I am connected on my home wifi.
I'm sure it's something simple that I'm missing but any suggestions would be greatly appreciated!
Thanks in advance!!
iPhone SE