Use special character input method. On Huawei mobile phones, you can also choose to use the special character input method to input the R mark. In any text editing application, such as SMS, WeChat, email, etc., long press the input box to pop up the menu bar, select input method settings, and then select special character input Law. In the special character input method, you can find the R mark and enter it. Different Huawei mobile phone models and system versions may be slightly different, and the specific operation methods may also be different. If you still cannot enter the R mark after trying the above methods, confirm the mobile phone model and system version, or consult the mobile phone manual or online information to find a solution. plan.