Rule of thumb for bandwidth is always to provide yourself with enough overhead for streaming as it will fluctuate slightly.
If you are streaming 2000 kbps, then you will need to ensure you have at a minimum 3MB/S of Dedicated upload speed for the stream.
If you are streaming 4000 kbps then you will need to ensure you have at least 5MB/S of dedicated upload speed to accommodate appropriately.
However, some network service providers have slower or more limited bandwidth depending on area and network coverage. That is not something that is within our control to address unfortunately. There are always alternative options to assist with mobile network streaming such as Mushroom for bonding