Who I have the same questioned this topic

I just got a brand new MiFi 7730L from Verizon.  Every day I get a text message from Suntrust on the MiFi saying what my bank balance is.  I suspect its because my mifi phone number was probably used  by someone else and they ended service and so when Verizon assigned the number to my MiFi the bank kept on sending messages.  All I have to do to end the daily message is to reply "STOP" but I can't figure out how to do that.  Can someone help?  Note that the message does not carry forward to my outlook app on my laptop.