If the wrong access points (APNs) have been entered on the OnePlus smartphone, we can easily delete them again.

Note: It is also recommended to delete unneeded access points, for example after changing providers.

Android 10 | OxygenOS 10.0
Step 1:  Open the  Settings
Step 2:  Tap on  Wi-Fi & network
Step 3:  Tap on  SIM & network
Step 4:  Choose a  SIM card
Step 5:  Tap on  Access Point Names
Step 6:  Choose an  APN
Step 7:  Open the  menu
Step 8:  Tap on  Delete APN
  1. Open the Settings
  2. Tap on Wi-Fi & network
  3. Tap on SIM & network
  4. Choose a SIM card
  5. Tap on Access Point Names
  6. Choose an APN
  7. Open the menu
  8. Tap on Delete APN

OnePlus Instructions