Ting can do it. It's one checkbox in my device settings panel. Here's the whole list of things I can tweak:

> Can use call forwarding > Can use call forwarding on busy/no answer > Can use call forwarding at any time > Can use call waiting > Can use hold > Can use three-way calling > Can use visual voicemail > Can make/receive calls > Can use voicemail > Can use Wi-Fi calling > Allow international long distance calls > Allow international roaming > Allow international roaming data > Can send/receive text messages > Block picture, video, and group messages > Can use data > Can use tethering