--- product_id: 35508027 title: "China Unicom Cross Border King Mainland -HK Prepaid SIM 4G Hong Kong Number (Stored-Value HK$80)" brand: "china unicom中国联通" price: "FREE" currency: TND in_stock: false reviews_count: 12 url: https://www.desertcart.tn/products/35508027-china-unicom-cross-border-king-mainland-hk-prepaid-sim-4g store_origin: TN region: Tunisia --- # Cross-border coverage 4G LTE connectivity 90-day validity with top-up China Unicom Cross Border King Mainland -HK Prepaid SIM 4G Hong Kong Number (Stored-Value HK$80) **Brand:** china unicom中国联通 **Price:** FREE **Availability:** ❌ Out of Stock ## Summary > 🌐 Stay connected beyond borders—because your network should be as global as your ambitions. ## Quick Answers - **What is this?** China Unicom Cross Border King Mainland -HK Prepaid SIM 4G Hong Kong Number (Stored-Value HK$80) by china unicom中国联通 - **How much does it cost?** FREE with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/35508027-china-unicom-cross-border-king-mainland-hk-prepaid-sim-4g) ## Best For - china unicom中国联通 enthusiasts ## Why This Product - Trusted china unicom中国联通 brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Auto-Deduction:** HKD $6 monthly service fee automatically deducted—no surprises, just smooth service. - • **Seamless 4G LTE Access:** Experience blazing-fast internet across China, Hong Kong, Macau, Taiwan, and Japan. - • **Extended 90-Day Validity:** Activate and enjoy uninterrupted connectivity for three months, with easy top-ups to keep you going. - • **Flexible 3-in-1 SIM Design:** Nano, Micro, or Standard SIM—fits any device without hassle. - • **Ultimate Cross-Border Freedom:** One SIM, multiple regions—stay connected wherever your business or travels take you. ## Overview The China Unicom Cross Border King Mainland-HK Prepaid SIM offers 4G LTE connectivity with a 3-in-1 SIM format compatible with all devices. Valid for 90 days post-activation, it supports voice, data, and SMS across China Mainland, Hong Kong, Macau, Taiwan, and Japan. The SIM includes an automatic monthly HKD $6 service fee deduction, ensuring hassle-free mobile service for frequent travelers and professionals seeking seamless cross-border communication. ## Description desertcart.com: China Unicom Cross Border King Mainland -HK Prepaid SIM 4G Hong Kong Number (Stored-Value HK$80) : Cell Phones & Accessories Review: Disappointing usability and performance - I used this SIM card for a recent trip to China. I was in Beijing, Taian and Tainjin. I have an unlocked motorola G5 phone, model XT1687. Once installed the SIM card seemed to recognize the network and some phone services worked intermittently. I wasn't able to send any SMS message to USA number without first buying an additional package for direct dialing. After purchase of that, I still wasn't able to send SMS messages. I was unable to get any assistance from the online help. Out of four numbers to the USA I tried to call all failed to connect save one. The card was quickly exhausted of value and I had to top it off again. After adding another HK $100 to the card, it lasted one USA phone call and about two hours before exhausting the value again. I gave up and just use hotel wifi after that. I can't say that the card doesn't work well in Hong Kong but in mainland China, I was quite disappointed both in the value and the performance of the SIM card. Review: Very bad. - I brought this sim card two weeks ago and I am very disappointed, this card expired on 12/31/2019. Yet it is available to purchase under desertcart. ## Features - The SIM card is valid for 90 days after activation (Expiry Date: 31/12/2019). The sim card can be topped up. Voice,data&SMS can be used in China Mainland,Hong Kong,Macau,Taiwan&Japan 3-in-1 SIM Card (Nano/Micro/Standard). HKD $6 / month Mobile Service License Fee will be deducted automatically on the first day of each calendar month from your account. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B01LXBV2WE | | Brand | China unicom中国联通 | | Cellular Technology | LTE | | Customer Reviews | 3.3 out of 5 stars 73 Reviews | | Item Weight | 1.1 ounces | | Manufacturer | China Unicom | | Mfr Part Number | ChinaUnicom-CrossBorder-4G | ## Images ![China Unicom Cross Border King Mainland -HK Prepaid SIM 4G Hong Kong Number (Stored-Value HK$80) - Image 1](https://m.media-amazon.com/images/I/61ilY5gYgyL.jpg) ![China Unicom Cross Border King Mainland -HK Prepaid SIM 4G Hong Kong Number (Stored-Value HK$80) - Image 2](https://m.media-amazon.com/images/I/51g3fIMVshL.jpg) ![China Unicom Cross Border King Mainland -HK Prepaid SIM 4G Hong Kong Number (Stored-Value HK$80) - Image 3](https://m.media-amazon.com/images/I/4104OLrUnBL.jpg) ![China Unicom Cross Border King Mainland -HK Prepaid SIM 4G Hong Kong Number (Stored-Value HK$80) - Image 4](https://m.media-amazon.com/images/I/41i3BDhxHbL.jpg) ![China Unicom Cross Border King Mainland -HK Prepaid SIM 4G Hong Kong Number (Stored-Value HK$80) - Image 5](https://m.media-amazon.com/images/I/51B4yJwb8oL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐ Disappointing usability and performance *by J***. on September 15, 2018* I used this SIM card for a recent trip to China. I was in Beijing, Taian and Tainjin. I have an unlocked motorola G5 phone, model XT1687. Once installed the SIM card seemed to recognize the network and some phone services worked intermittently. I wasn't able to send any SMS message to USA number without first buying an additional package for direct dialing. After purchase of that, I still wasn't able to send SMS messages. I was unable to get any assistance from the online help. Out of four numbers to the USA I tried to call all failed to connect save one. The card was quickly exhausted of value and I had to top it off again. After adding another HK $100 to the card, it lasted one USA phone call and about two hours before exhausting the value again. I gave up and just use hotel wifi after that. I can't say that the card doesn't work well in Hong Kong but in mainland China, I was quite disappointed both in the value and the performance of the SIM card. ### ⭐ Very bad. *by A***R on July 22, 2020* I brought this sim card two weeks ago and I am very disappointed, this card expired on 12/31/2019. Yet it is available to purchase under Amazon. ### ⭐ Do NOT buy. Faulty product. *by A***N on October 8, 2018* We purchased 2 sim cards in anticipation of our mainland China and Hong Kong trip. On our last similar trip, we had difficulties buying a sim card in the mainland as us citizens and were too rushed to make a sim card purchase in the HK airport due to an airline connection. This trip we purchased the sim cards to have ready cards upon arrival. Unfortunately, the service was horrendous in terms of cell coverage, actual functionality, and customer service as well. One sim card could only make calls with spotty coverage in the mainland without data service. Another card could only do data and no voice despite adequate funds on the sim cards. Website would not allow Visa credit card top up of funds through their own checkout website or thru Visa checkout. Customer service was available by online chat but offered no additional help in troubleshooting to top off. We threw away the cards and ended up using our us carrier international plans which was pricey but reliable. Do NOT purchase. Would recommend 1) purchasing sim cards at the HK airport if time allows 2) using USA cell carrier international plans for mainland portion of trip and purchasing HK sim card when needed 3) finding another sim card brand. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.tn/products/35508027-china-unicom-cross-border-king-mainland-hk-prepaid-sim-4g](https://www.desertcart.tn/products/35508027-china-unicom-cross-border-king-mainland-hk-prepaid-sim-4g) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-08-29*