1. WeChat is not installed on the mobile phone.

Wechat reading needs to jump to Wechat when logging in. If WeChat is not installed on the mobile phone, you can't jump to WeChat when logging in, and you can't log in if you can't jump to WeChat.

2. WeChat reading is not compatible with mobile phones.

With the continuous updating of Android system and software, many softwares can only adapt to the latest system version, while those mobile phones with lower system versions will have many softwares that are incompatible and flash back.

The solution to this phenomenon is,

(1) Update the mobile phone system to the latest version.

(2) Download back to the old version of the app.

Summary: To solve the problem that WeChat reading cannot log in, we must first check whether WeChat is installed on the mobile phone, and then check whether the version of the mobile phone system is suitable for WeChat reading app.

I hope it helps you.