To make a call on the OnePlus smartphone, we simply open the pre-installed phone app and decide whether to select a stored contact or enter a phone number using the dial pad.

Note: When using Dual SIM, we will be asked from which SIM card to call from and whether this selection should be saved for the corresponding contact.

Android 10 | OxygenOS 10.0
Step 1:  Open the  Phone app
Step 2:  Tap on  Contacts  or  Dial pad
Step 3:  Enter a  phone number
Step 4:  Tap on the  green phone icon
Step 5:  Choose a  SIM card   (Dual SIM)
  1. Open the Phone app
  2. Tap on Contacts or Dial pad
  3. Enter a phone number
  4. Tap on the green phone icon
  5. Choose a SIM card (Dual SIM)

OnePlus Instructions