It may be because you have no data network, so you can't load it. Let me teach you how to open and find the historical symbol:

Demonstration software version: 8.9.28; Mobile phone model: vivo Y31s.

The specific steps are as follows:

1. Slide down the control center at the top to open the data network, and orange indicates success.

2. Then open QQ on your mobile phone and click on the avatar.

3. Then click on the avatar on the left.

4. Then find the signature column above and click.

5. After entering, click the History tab.

6. Then you can see the historical signature.

If you want to delete, click Manage in the upper right corner, select signature, and then click Delete below to delete.