Here are the steps to check if your calls have been forwarded using a USSD code:
1. Open your phone's dialer app.
2. Dial the USSD code *#21#.
3. This code will display the call forwarding status for your phone. It will show you if calls are being forwarded, and to what number they are being forwarded to.
The *#21# USSD code is a standard way to check the call forwarding settings on most mobile phones. This allows you to quickly see if your calls are being diverted to another number, which could be helpful if you suspect call forwarding has been enabled without your knowledge.
Let me know if you have any other questions! In the comment section