Several factors have a significant influence on the test result. The main ones are:
- the contractually agreed maximum bandwidth of your mobile Internet access (e.g. speed throttling (download/upload) depending on the chosen tariff and/or after exceeding a specific volume included in the monthly base fee)
- the bandwidth utilisation of your Internet provider
- the device you are testing with
- the operating system of the device and its configuration
- simultaneous use of the same connection by other users or programs (e.g. filesharing, updates)
If LAN is used:
- the quality of your LAN router (e.g. NAT throughput)
If WLAN is used:
- the distance between the WLAN router and your device
- the quality of your WLAN router (e.g. supporting 802.11ac or 802.11ax)
- If mobile services are used:
- the technology used (2G/EDGE, 3G/UMTS/HSPA, 4G/LTE, 5G/NR)
- the quality of service at your location (signal strength, depending on the device)
- whether you are inside or outside a building
- how fast you are moving (e.g. lower data transmission rates on the motorway or in the train)
- the number of users sharing the base station with you