How to block SMS numbers?
There is no out-of-the-box option, but it is possible to create an incoming SMS rule that matches a contact group. The group can be named Blocked numbers, and the rule could trash the conversation. (Screenshot of the rule below)
To block a number, simply add it to the contact group Blocked numbers.
![Rule to block SMS number](https://ddux7jl4k2xkx.cloudfront.net/assets/faq/block-sms-39b8614b7206093e793415e0eac5c3cc958b45cf4470e3b2e3e3865566c23578.png)