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 10 (ColorOS 7.0)
Step 1:  Open the  Phone -App
Step 2:  Enter  Phone number  or use Smart Search and enter the Name of  contact
Step 3:  Tap on  Contact  you want
Step 4:  Choose between  Call using
  1. Open the Phone-App
  2. Enter Phone number or use Smart Search and enter the Name of contact
  3. Tap on Contact you want
  4. Choose between Call using "SIM1" and Call using "SIM2" [DUAL-SIM]

Oppo Instructions
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