Chapter 85 covers electrical machinery and equipment and parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles. This chapter is one of the most technology-intensive chapters in the HS classification, including various electrical devices such as power generation, transformation, energy storage, communications, and consumer electronics. As a key part of communication equipment, the classification logic of mobile phone antennas is directly related to the electrical equipment attributes of this chapter. Heading 8517 covers telephone sets, including telephones for cellular networks or for other wireless networks; other apparatus for the transmission or reception of voice, images or other data, including apparatus for communication in a wired or wireless network (such as a local or wide area network). This heading includes both complete communication terminal equipment and its dedicated parts. As a dedicated part of mobile phones, mobile phone antennas are classified under this heading if they meet the conditions for parts classification. Code 851770 is a six-digit subheading. The first two digits '85' represent Chapter 85 (electrical machinery and equipment and parts thereof). The 3rd-4th digits '17' represent heading 8517 (telephone sets and communication equipment). The 5th-6th digits '70' represent subheading 851770, i.e., parts designed for use solely or principally with the apparatus of heading 8517. Note that not all mobile phone antennas are automatically classified under this subheading: if the antenna is a general-purpose antenna with independent function, it may be classified under other headings; only when it is a dedicated part of a mobile phone and meets the parts classification rules is it classified under 851770. Mobile phone antennas are core dedicated parts for mobile phones to achieve wireless communication functions, and are typically designed, manufactured, and sold together with the complete mobile phone. According to the General Rules for the Interpretation of the HS, if a part is designed for use solely or principally with the apparatus of a particular heading and is not excluded by the notes to Section XVI, it should be classified under the heading of that apparatus. Complete mobile phones are classified under 8517, and their dedicated antennas as parts are therefore classified under 851770, rather than being classified as independent antennas under other headings (such as 8529, etc.).

Product Name: The Chinese and English names of the declared commodity should accurately reflect the product attributes, such as '手机天线 Mobile phone antenna'. Avoid using general names such as 'antenna' or 'accessory'. Use: Explain what device the antenna is dedicated to, such as 'for smartphones', 'for cellular mobile phones', etc. The use is the key to determining whether it is a dedicated part. Brand: Declare the brand or manufacturer name of the antenna; if there is no brand, fill in 'no brand'. Brand information helps customs confirm the source of goods and intellectual property status. Model: Fill in the specific model or specification of the antenna, which should be consistent with the actual goods. The model is an important identifier for distinguishing different products. Material: Explain the main material of the antenna, such as metal, ceramic, plastic, FPC, etc. The material affects classification and tariff treatment. Working Principle: Briefly describe how the antenna works, such as 'receiving and transmitting signals through electromagnetic waves'. Helps distinguish active/passive antennas. With or Without Connecting Cable: Explain whether the antenna has a connecting cable, connector, or other accessories. An antenna with a cable may affect classification. Applicable Network Standard: Such as 2G/3G/4G/5G, Wi-Fi, Bluetooth, etc. Different standards may affect classification, but mobile phone antennas are generally classified under the same subheading. Customs declaration example: Product Name: Mobile phone antenna Use: For wireless communication signal transmission and reception of smartphones Brand: Huawei Model: ANT-5G-001 Material: FPC + metal contacts Working Principle: Electromagnetic wave reception and transmission With or Without Connecting Cable: Without Applicable Network Standard: 5G NR/LTE/WCDMA/GSM HS Code: 851770 Declaration elements should be filled in truthfully and completely, ensuring consistency with the actual goods. Mistakenly classifying mobile phone antennas under 8529 (parts of radar and radio navigation equipment); in fact, mobile phones are communication equipment and should be classified under 8517. When declaring the antenna together with the complete device, failing to list the antenna separately, resulting in omission of the part. Ignoring whether the antenna has a connecting cable; an antenna with a cable may be mistakenly classified under 8544 (insulated wire and cable) and other headings.

The core basis for classification is General Rules 1 and 6 for the Interpretation of the HS and the notes to Section XVI. As a dedicated part of mobile phones, if the mobile phone antenna meets the 'designed for use solely or principally with' the apparatus of heading 8517 and is not subject to exclusion clauses, it is classified under 851770. Note: if the antenna is a general-purpose antenna that can be used with multiple devices, it may be classified under other headings according to material or function (such as 7419 copper articles, 7616 aluminum articles, etc.). In addition, an active antenna with an amplifier may be regarded as equipment with independent function and classified under other headings. 852910 Aerials and aerial reflectors of all kinds; parts thereof: 852910 covers independent antennas and parts, applicable to general-purpose antennas or antennas for radar and radio equipment. If a mobile phone antenna is dedicated to mobile phones, it is preferentially classified under 851770 rather than 852910. 854442 Other electric conductors, for a voltage not exceeding 80 V, fitted with connectors: If a mobile phone antenna has a connecting cable and is declared as a cable assembly, it may be mistakenly classified under 854442. However, the antenna is essentially a communication part and should still be classified under 851770. 851762 Machines for the reception, conversion and transmission or regeneration of voice, images or other data: 851762 includes network communication equipment such as routers, switches, etc. A mobile phone antenna is a part, not a complete device, so it is classified under 851770. 851779 Other parts of the apparatus of heading 8517: 851779 covers other parts under 8517, but 851770 specifically covers dedicated parts such as mobile phone antennas. The two need to be distinguished according to the specific device type. Is the antenna dedicated to mobile phones or cellular network telephones? Does the antenna have an independent function (such as a built-in amplifier)? Is the antenna imported together with the complete device but needs to be declared separately? Does the antenna material affect classification (such as precious metals)? Have the exclusion clauses in the notes to Section XVI been ruled out?

Which HS code should mobile phone antennas be classified under? Mobile phone antennas are generally classified under HS code 851770, i.e., dedicated parts under heading 8517. However, it must be confirmed that the antenna is dedicated to mobile phones and does not have an independent function. If it is a general-purpose antenna, it may be classified under 852910. It is recommended to judge based on the actual product and use, and consult customs if necessary. How to check the tariff rate for 851770? Tariff rates vary by country, trade agreement, and country of origin. The latest rates can be obtained through customs official websites, tariff query systems, or by consulting a customs broker. Note the applicable conditions for most-favored-nation rates, general rates, and agreement rates. If a mobile phone antenna is imported together with the complete mobile phone, does it need to be declared separately? If the antenna is imported together with the complete device and constitutes the complete device, it is usually classified as the complete device. However, if the antenna is packaged separately, sold separately, or used for repair, it needs to be declared separately. It is recommended to judge based on the actual trade status to avoid omission. Does the classification of a mobile phone antenna with a connecting cable change? A connecting cable does not affect its nature as a mobile phone antenna, and it should still be classified under 851770. However, if the connecting cable is long and serves as an independent cable assembly, it may cause classification disputes. When declaring, it should be clearly described that the antenna is the main component and the connecting cable is auxiliary. Is there a difference in classification between active and passive mobile phone antennas? Passive antennas are generally classified under 851770. If an active antenna contains active components such as an amplifier, it may be regarded as equipment with independent function and classified under other headings (such as 8543). It needs to be judged based on the specific circuit and function. What is the difference between 851770 and 852910? 851770 covers parts dedicated to the apparatus of heading 8517, such as mobile phone antennas. 852910 covers independent antennas and parts, applicable to radar, radio, and other equipment. Because a mobile phone antenna is dedicated to mobile phones, it is preferentially classified under 851770. What are the most common errors when declaring mobile phone antennas? Common errors include: declaring the product name as 'antenna' without specifying it is for mobile phones; omitting the brand or model; mistakenly classifying an antenna with a cable under 8544; failing to distinguish active from passive. It is recommended to fill in the declaration elements in detail to ensure accurate classification. How to declare mobile phone antennas sold through cross-border e-commerce? Cross-border e-commerce requires declaration according to the actual commodity, providing complete product name, use, brand, model, etc. If shipped through postal or express channels, the HS code must also be truthfully declared. It is recommended to use 851770 and keep relevant supporting documents for inspection.