1. Use a standard charger to charge the mobile phone.
2. If the mobile phone is not used for a long time, or the mobile phone is not charged in a timely manner after being powered off with low power, the battery may be overdischarged. It is recommended that you connect the charger to charge the mobile phone for more than 30 minutes to check whether the mobile phone responds.
3. If the charger can be charged properly after replacement, it is possible that the charger and data cable are faulty. It is recommended that you carry the faulty charger and the invoice of the data cable to the site for repair.
4. If the handset does not respond after the above operations, it is recommended that you carry the handset and purchase invoice to the office for repair.