It seems that whether or not the user to prompted before texting depends on the app. I've been using the Verizon Message+ app since before I can remember. On my new OnePlus 8T I find that it only lets me TXT via sim1 (which happens to be the Verizon ...
Great promo! I just activated today and signed up for the promo after... can you confirm there will be no problem with that sequence? I ask because sometimes you have to sign up for promos before activation. Thanks!