My internet speed is very slow. When I download some documents the speed is always less than 1MB/S (wireless, laptop), which is much lower than the promised speed. When I send message to friends using my phone, it always takes me very long time to wait for it being sent. 

Before, I lived in other places, and there was no such problems. And when I am in school and connect to Eduroam Wi-fi, the internet is fast and convenient. So I suppose there is no problem in my devices and connections. I am sitting right next to the router so it might also not because I am too far away from the router.

3 weeks before I installed the new router you sent to me, but the situation has not been improved. (BTW I have sent back the old router).

THANK YOU! 

update: I just checked the router and connections, seems that it is using DSL connections. Is it possible to upgrade it to optical fiber connection for my present subscription?

P.S. I am representing my aunt to ask for help.