OPPO A16s

OPPO A16s

Android 11.0

I can't make voice calls on my OPPO A16s Android 11.0

Cause 10 of 12: Your SIM is defective

You can check if your SIM is defective by inserting it in another phone.

Solution: Find the nearest Vodafone Shop to order a new SIM.

OPPO A16s

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