Generally, the input methods that come with Huawei mobile phones are "Baidu Input Method Huawei Edition". Here are the specific locations of "special symbols" and "mathematical symbols": First, open the input method panel. After opening the panel, find the "symbol" button on the panel and click Open (this button will be available on every keyboard panel, please find it for details).

2. After opening the symbol list, slide up in the symbol classification on the left.

3. Find the number and click Open. The symbol on the right is a number symbol.

Fourth, then find "special". After clicking, the symbol on the right is the symbol of special classification.