Yes, the box of Huawei mobile phone is plastic sealed. This is to ensure that the phone is not unwrapped by someone, to prevent the phone from being used by others or switched. Therefore, Huawei mobile phones have plastic packaging, if the business gives you a mobile phone is not plastic, it is unsealed by the business. The user can check whether the string code of the phone is consistent with the box. And check to see if the phone was activated