SG-1111 issues with 500mb | 500mb

I just bought a SG-1111 and have 500mb | 500mb I plugged it in and my download speed went down to between 335 and 379mb and my upload stayed between 435mb and 510mb. Is there a setting I need to set to get it to use the full 500mb? On the main dash, it did show 1gb.

I assume you have an SG-1100 and have you tried this?