Can also text 911 now which would overburden the texting protocol network so no one else’s texts will go through.

It’s a cell tower jammer and terrorism multiplier. Can’t call or text. It will probably disturb internet service as well. Include a few radio jammers for local police and a few satellite antennas you could create an opportunity then a panic to cover your tracks getting out.

Its relatively hard to jam modern BTS with LTE and 5G. It's part of the design. PTP with fancy modulation helps :p

I would wager a huge majority of text messages in NYC will go through either RCS or iMessages which skips the SMS layer and instead goes direct to data.