How to set up SMS calls on mobile phones for the elderly?

I don't know which operator your text message was sent to. Here is an example of China mobile SMS calling settings for your reference:

1. First, open China Mobile official website through the browser on your computer, or use the mobile APP "Start in China".

2. Then enter "SMS Call" in the search box on the main page of official website, and click Search;

3. Then the page will jump, and click the "SMS Call" searched in the jump page;

4. On the opened SMS page, click "Handle Now" to start the SMS calling service.

Extended content: SMS call forwarding service is a short message forwarding function, which provides customers with voice-like call forwarding. Customers can use this service as long as they apply for the SMS call forwarding function and set the forwarding number as required. After setting SMS call forwarding, the mobile phone will no longer receive peer-to-peer messages from other mobile phone numbers, but directly forward them to the mobile phone calling the target number.