Buying a new phone and a new line is a good hack imo. You only add apps that grow you. You only add phone numbers that is better aligned with the new you. Still keep the old phone but away, maybe in the garage or another room.

A lot of the quitting addiction is probably about making it harder to reach. I once had a video game that I was having trouble quitting. But I decided to uninstall it after playing. Next time when the urge to play returned I just didnt bother to to reinstall it. Effectively making me help quit.