If you can not use normally first, it is recommended to carry the mobile phone, invoice, warranty card, original charger to the after-sales service center to test it, you can use other vivo mobile phones to enter the Settings -- more Settings -- after-sales service inside to query the address of the after-sales service center for easy access, warm tips: Before going to the after-sales service, please call to confirm whether the after-sales service is working normally (such as after-sales training, etc.) to avoid a trip in vain.