Iphone6plus wechat send button is grayed out.

To enter Settings/SMS, just turn off the switch of the subject of the letter. The solution is as follows:

1. First find WeChat on your mobile phone and find "I", as shown below.

2. Then on the personal center page that opens, find and click Settings, as shown in the figure below.

3. Click "Settings" and click "Chat" in the settings interface, as shown below.

4. Then there is an "Enter key to send a message" in the chat, and the button behind it is closed, as shown in the figure below.

When you return to the interface of chatting with friends, you will find that the "Send" button can be used.