Düsseldorf is the capital of North Rhine-Westphalia, Germany, located on the Rhine River. Dusseldorf is the seventh most populous city in Germany, with a population of 1.5 million in the urban area. It is an important city in Germany's advertising, clothing and communication industries.

Düsseldorf is a major transfer station for Deutsche Bahn, with more than 1,000 trains stopping here every day. The centrally located Düsseldorf Main Station opened in 1891 and serves 250,000 passengers daily, making it the fourth busiest railway station in Germany.

T-Mobile - Germany is the hometown of T-Mobile, the largest telecom operator in Europe and the fifth largest telecom operator in the world, headquartered in Bonn, Germany. Deutsche Telekom is also the market leader in mobile communications in Germany, with more than 32,000 wireless telecommunications networks, 32,000 employees and 160 million customers per year. In addition, more than 1,500 new stores are put into operation every year. There are also LTE and 5G extensions at thousands of existing locations. As part of a massive expansion campaign, 5G is becoming the new standard for telecommunications cellular networks and already offers 5G to 80% of Germany's population. The network coverage rate of LTE users in the whole country is about 99%.

Vodafone DE - Vodafone fills a supply gap on approximately 300km of ICE routes and motorways. At Germany's largest airport, more than 10 million passengers benefit from the 4G | LTE network. Vodafone wants to achieve 98% national network coverage by 2020. Vodafone is the first network operator in Germany to bring users into the 5G era. By 2021, 20 million people in Germany will be connected to Vodafone's 5G mobile network.

O2 DE - Telefónica Deutschland provides private and business customers with telecommunications services, as well as innovative digital products and services in the field of Internet of Things and data analytics. With 50.4 million customers and 8,500 employees as of December 31, 2019, the company is one of Germany's leading integrated telecommunications providers. Under the core brand O2, the company sells postpaid and prepaid mobile communication products with innovative mobile data services. Its basis is a cellular network based on high-performance GSM, UMTS and LTE infrastructure. Telefónica Deutschland also provides telephony and high-speed Internet products such as VDSL in fixed-line networks.

1. The Old Town (Altstadt) of Dusseldorf, Germany belongs to the first district of the city, located on the Rhine River, with many historical buildings and 260 pubs and restaurants. The old town is quaint and full of traditional German residential buildings. It also contains famous tourist shopping spots and business districts, such as Kings Road. A large flow of people is suitable for large-scale flow tests, and it has a variety of test scenarios and many CA test environments. There are many urban rail lines in the old city, which meet the Mobility Testing test conditions.

2. Düsseldorf Hauptbahnhof (Düsseldorf Hauptbahnhof) is the main station of Dusseldorf, the capital of North Rhine-Westphalia, Germany. It serves 250,000 passengers a day and is the fourth busiest station in Germany.
Near the train station is the staff dormitory of Tijet Technology International GmbH, which is close to the 5G base stations of the three major operators in Germany, which is convenient for 5G function testing and aging and current testing. Under the N78 environment of T-Mobile, the aging machine is flashed with the aging version, and the aging program is installed and configured. The purpose of the aging test is as follows: (1) To comply with the relevant quality technical standards; (2) To avoid losses caused by aging; (3) To improve the reputation of the product; (4) To test the supplier’s product quality; (5) ) Improve the weather resistance of products; (6) Significantly reduce material costs; (7) Expand product varieties; (8) Help enter new markets; (9) Win in competition

3. The new headquarters of Vodafone Deutschland is located on the former Gatzweiler site on Bruesseler Strasse in the Heier district of Düsseldorf. The headquarters has both SA 5G and NSA 5G base stations. In this scenario, dual-SA, single-SA, and dual-NSA test cases can be completed. The 5G frequency band in this environment also meets the Performance test conditions to ensure the smooth completion of use cases related to 5G speed measurement.

City rail (S-Bahn), subway (U-Bahn), and bus (Bus) constitute a very convenient and smooth transportation network in Dusseldorf. Citizens and tourists can use these transportation methods to reach their destinations. It is also very convenient to travel from Dusseldorf to other nearby cities. The light rail and railway networks are very dense. IC intercity trains and EC European intercontinental trains run between Dusseldorf and Hamburg. Hannover and Frankfurt have ICE intercity express trains , there are also many trains to Cologne and other major German cities, ranging from every half hour to every two hours.

From September 1, 2019 to September 8, 2021, the field test team in Dusseldorf, Germany successfully completed 68 external and soft test projects of 6 well-known mobile phone brands. Customers have all given satisfactory evaluations, and we are determined to complete each field test task efficiently and with high quality.