If you have difficulties to decide for a subscription, you can use this information as a help:
Flat 0.4: For trackers and sensors, the speed is only sufficient for very small amounts of data
Flat 1: For VoIP applications, the speed is sufficient for voice connections over the Internet (WhatsApp)
Flat 10: For single smartphones and tablets, the speed is enough to surf the Internet
Flat 50: For more than one smartphones and tablets, the speed is sufficient for streaming videos (YouTube, Netflix)
Flat 300: For routers and hotspots, the speed is sufficient for several simultaneous connections (WLAN)
Please note that this information is only our recommendations. Performance may vary between devices.
If you want to read more about device specific use cases you can find them here.