How to cancel the blacklist of Lenovo mobile phone short messages?

Because there are many models of Lenovo mobile phones, the functions and menus of different models are different. Take the P70-t model as an example. If you need to set a blacklist before deleting, you can enter the self-contained music to delete safely. Due to different music security versions, the menu path may be different. Take V6.2.2 version as an example, the path and operation steps are as follows: music security-harassment interception-gear icon in the upper right corner-blacklist, and the previously set blacklisted contacts can be deleted directly.