Except the possibility to keep the current price is no longer available, therefore, the consumer does not have the option to continue paying the same price, ergo TMobile forced the customer to change the price they pay, either to a higher amount for the same contact or to 0 for no contact. The original advertisement stated that TMobile would never change the price a customer pays, but it directly forcing this change by not offering the same contact.
I use xournal++ for notes and math stuff. Have looked at rnote as well but haven’t really dove in and tried it thoroughly.