The internet connection speed could be affected by many factors, sometimes it becomes difficult for a user to determine the issue. You can take the help of the Internet speed test function to determine the Internet speed for what you are paying for. If the resultant speed doesn't match the Internet plan that you subscribed from the Internet Service provider, contact him as soon as you can. Make sure that the tplinkwifi.net device is not exposed to sunlight, it may cause a slow data connection issue.