I bought a new Redmi1S. Why doesn't the delete key work when I send a text message?

I suggest you restore the factory settings. If there are any more questions,

Please go to the maintenance point near you or Xiaomi's house to have a test.

Maintenance point address and telephone inquiry: /c/service/poststation/

Xiaomi's home address inquiry: /c/xiaomizhijia/

The working hours of Xiaomi House are from Tuesday to Sunday, 10 am to 6 pm.

If there is no outlet near you, please go to Xiaomi official website/,log in to the account where you bought the product, select Apply for after-sales in the order details, and then please keep your mobile phone open. The staff of Xiaomi Company will contact you.