Why is the original charger suddenly displayed as a standard charger for fast charging?
The charger, data cable, and handset charging interface are not properly connected during charging, and the standard charger may be unidentifiable. Verify that the connectors and jacks are clean. If there is dust, wipe the connectors with alcohol or clean the connectors with a brush. If you wipe it with alcohol, after the alcohol is dried, verify that all interfaces are connected properly, and then recharge the battery.
If the problem persists, take the charger, data cable, handset, and purchase voucher to the ZTE after-sales office for repair.
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