OPPO A78 5G
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It's not possible to start my phone
Solution 6 of 7: You're asked to key in the PUK
If you've keyed in an incorrect PIN three times in a row, you need to key in the PUK.
Call customer services on 150 (from an EE phone) or 07953 966 250 (from other phones) to get the PUK.