One of the many basic functions of the Oppo smartphone is of course making a phone call. Making a call can be done in many ways. It is possible via the Contacts app but also directly via the Phone app, as this guide shows.

Android 11 | ColorOS 11.0 | Google Contacts
Step 1: Tap on  Phone
Step 2: Tap on  Contacts  or  Dial pad
Step 3: Enter a  Phone number
Step 4: Tap on  Phone button
Step 5: Choose a  SIM card   (Dual SIM)
  1. Tap on Phone
  2. Tap on Contacts or Dial pad
  3. Enter a Phone number
  4. Tap on Phone button
  5. Choose a SIM card (Dual SIM)

Oppo Instructions