Oppo How to Set default SIM card for mobile data

Oppo 9

In addition to calls, a standard SIM card for mobile data can also be changed and the device will only use the specified SIM card for mobile data.

Note: After changing the default SIM card, the device will search for a network again.

Android 10 (ColorOS 7.0)
Step 1: Open the Settings
Step 2: Tap on SIM card & mobile data
Step 3: Tap on Mobile data
Step 4: Choose between SIM1  and SIM2
Step 5: Confirm with Switch
  1. Open the Settings
  2. Tap on SIM card & mobile data
  3. Tap on Mobile data
  4. Choose between SIM1 and SIM2
  5. Confirm with Switch
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