So the mobile company will monitor your texting and add that tax to your bill?
They voted for this. They got it.
I am sure they all ready know exactly how many texts you send and receive.
It just of matter of billing you for them.
Carriers already are required to add taxes to fund subsidies for rural areas. There is also a lifeline program for qualifying low income people. I don't know details but programs like this exist already. Not enough for California.
In fact there used to be an excise tax the carriers had to pass long that was left over to pay for the Spanish American War. Teddy Roosevelt got it passed and it wasn't stopped until 2005!