Saipan forum can apply at eleven o'clock every day, but it is very slow.
Or go to the smart home (unlimited times).
The signature software comes from Saipan Forum, which is simple and practical.
Instructions or go to Saipan forum, where the section is written in detail.
You'd better apply for it yourself, and you can get it back if you lose it!
The mobile phone house now only has an online sign. Just download a tool.
It is also recommended to apply for smart home (6 hours) or Saipan forum (limited time).