Wireless speed or range can be improved working on the following solutions:

Choose the best suitable locations.
Optimizing the device configuration.
Upgrading equipment.

Choosing a suitable location
Position the modem or router correctly for the signal.

Avoid interference in the coverage area and it is also advisable to keep the device safe from any electromagnetic noise sources.

Optimizing the device configuration

Interference with the signal is one of the factors which affects the performance. Modem requires updates and to increase the modem or range regular updates plays an significant part.

To avoid interference, device configuration is recommended away from radio frequency equipment.
To change the channel settings go to Wireless and then move to Wireless settings.

Upgrade the equipment

To boost the wireless network throughout it is recommended to upgrade the combination of antennas or the wireless equipment.

There are also other ways to improve the TP link modem speed or range which are as follows:

1. Change the channel or update the router firmware.
2. Change the position and also update the adapter firmware.
3. Set up a second router as the access point.
4. Antennas and new router/adapter.

Contact TP link modem customer service to know more about the steps and processes to improve the modem speed and range. Technical experts deals with these issues on regular basis and thus provides solution to the modem issues effectively.